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  <xsd:element name="StockIssuedDuringPeriodSharesNewIssuesPreferredStock" id="radh_StockIssuedDuringPeriodSharesNewIssuesPreferredStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PreferredStockAdditionalSharesIssuedInExchangeForAdditionalInvestment" id="radh_PreferredStockAdditionalSharesIssuedInExchangeForAdditionalInvestment" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityAccretionStockIssuanceCosts" id="radh_TemporaryEquityAccretionStockIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="AccretionOfPreferredStockToRedemptionValue" id="radh_AccretionOfPreferredStockToRedemptionValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityAccretionInvestorsRightsObligations" id="radh_TemporaryEquityAccretionInvestorsRightsObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ResearchAndDevelopmentExpenseToBeSettledInStock" id="radh_ResearchAndDevelopmentExpenseToBeSettledInStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="UnrealizedGainLossOnFairValueOfWarrantLiabilityAndOtherLiability" id="radh_UnrealizedGainLossOnFairValueOfWarrantLiabilityAndOtherLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityAccretionOfInvestorRights" id="radh_TemporaryEquityAccretionOfInvestorRights" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityWarrantsIssuedDuringPeriodValueNewIssue" id="radh_TemporaryEquityWarrantsIssuedDuringPeriodValueNewIssue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="RecapitalizationDisclosureAbstract" id="radh_RecapitalizationDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RecapitalizationLineItems" id="radh_RecapitalizationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RecapitalizationDisclosureTextBlock" id="radh_RecapitalizationDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityDisclosureTextBlock" id="radh_TemporaryEquityDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LicenseAgreementsDisclosureAbstarct" id="radh_LicenseAgreementsDisclosureAbstarct" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AccruedResearchCostsCurrent" id="radh_AccruedResearchCostsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="NumberOfOtherProductCandidatesInPhase2ClinicalDevelopmentOrPreclinicalDevelopment" id="radh_NumberOfOtherProductCandidatesInPhase2ClinicalDevelopmentOrPreclinicalDevelopment" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="LongTermIncentivePlan2003Member" id="radh_LongTermIncentivePlan2003Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityIncentivePlan2011Member" id="radh_EquityIncentivePlan2011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePriceOfCommonStockPercentApplicableToStockholdersOwningMoreThanTenPercentOfTheEntitysCommonStock" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePriceOfCommonStockPercentApplicableToStockholdersOwningMoreThanTenPercentOfTheEntitysCommonStock" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOwnershipInEntitysCommonStockRequiredForSpecifiedExercisePrice" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOwnershipInEntitysCommonStockRequiredForSpecifiedExercisePrice" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePeriod" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePeriodApplicableToStockholdersOwningMoreThanTenPercentOfTheEntitysCommonStock" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePeriodApplicableToStockholdersOwningMoreThanTenPercentOfTheEntitysCommonStock" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIntrinsicValueAbstract" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsIntrinsicValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodAggregateIntrinsicValue" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodAggregateIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityIssuancePricePerShare" id="radh_TemporaryEquityIssuancePricePerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="CollaborativeAgreementResearchAndDevelopmentExpenseRecognitionPeriod" id="radh_CollaborativeAgreementResearchAndDevelopmentExpenseRecognitionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityConversionPricePerShare" id="radh_TemporaryEquityConversionPricePerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="TemporaryToPermanentEquityConversionRatio" id="radh_TemporaryToPermanentEquityConversionRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="TemporaryToPermanentEquityConversionRatioUponFailureToFulfillFutureFundingObligation" id="radh_TemporaryToPermanentEquityConversionRatioUponFailureToFulfillFutureFundingObligation" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PercentageOfOutstandingTemporaryEquitySharesHoldersVoteRequiredForConversion" id="radh_PercentageOfOutstandingTemporaryEquitySharesHoldersVoteRequiredForConversion" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="OldPreferredStockMember" id="radh_OldPreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfMembersThatCanBeElectedByTemporaryEquityHolders" id="radh_NumberOfMembersThatCanBeElectedByTemporaryEquityHolders" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PercentageOfOutstandingTemporaryEquitySharesRequiredToBeCoveredUnderTheRegistrationStatement" id="radh_PercentageOfOutstandingTemporaryEquitySharesRequiredToBeCoveredUnderTheRegistrationStatement" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="MonthlyLiquidatedDamagesAsPercentageOfPurchasePriceRequiredToBePaidByTemporaryEquityHoldersUponSpecifiedCondition" id="radh_MonthlyLiquidatedDamagesAsPercentageOfPurchasePriceRequiredToBePaidByTemporaryEquityHoldersUponSpecifiedCondition" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="AggregateLiquidatedDamagesAsPercentageOfAggregatePurchasePriceRequiredToBePaidByTemporaryEquityHoldersUponSpecifiedCondition" id="radh_AggregateLiquidatedDamagesAsPercentageOfAggregatePurchasePriceRequiredToBePaidByTemporaryEquityHoldersUponSpecifiedCondition" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PeriodAfterClosingOfMergerWithinWhichTheRegistrationStatementIsToBeFiled" id="radh_PeriodAfterClosingOfMergerWithinWhichTheRegistrationStatementIsToBeFiled" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PeriodAfterClosingDateOfMergerRegistrationStatementIsNotDeclaredEffectiveBySECTheEntityWillBeRequiredToPayLiquidatedDamages" id="radh_PeriodAfterClosingDateOfMergerRegistrationStatementIsNotDeclaredEffectiveBySECTheEntityWillBeRequiredToPayLiquidatedDamages" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PeriodAfterClosingDateOfMergerRegistrationStatementIsReviewedBySECAndHasCommentsTheEntityWillBeRequiredToPayLiquidatedDamages" id="radh_PeriodAfterClosingDateOfMergerRegistrationStatementIsReviewedBySECAndHasCommentsTheEntityWillBeRequiredToPayLiquidatedDamages" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PeriodAfterClosingDateOfMergerRegistrationStatementIsNotFiledTheEntityWillBeRequiredToPayLiquidatedDamages" id="radh_PeriodAfterClosingDateOfMergerRegistrationStatementIsNotFiledTheEntityWillBeRequiredToPayLiquidatedDamages" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="SCRASSASAndAffiliatesMember" id="radh_SCRASSASAndAffiliatesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SublicenseAgreementMember" id="radh_SublicenseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeArrangementNonrefundablePaymentMade" id="radh_CollaborativeArrangementNonrefundablePaymentMade" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeArrangementAdditionalPaymentsToBeMadeUponAchievementOfCertainDevelopmentAndCommercializationMilestones" id="radh_CollaborativeArrangementAdditionalPaymentsToBeMadeUponAchievementOfCertainDevelopmentAndCommercializationMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeArrangementRoyaltyRate" id="radh_CollaborativeArrangementRoyaltyRate" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeArrangementPeriodAfterDateOfFirstCommercialSaleOfProductForPaymentOfRoyalties" id="radh_CollaborativeArrangementPeriodAfterDateOfFirstCommercialSaleOfProductForPaymentOfRoyalties" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExtinguishmentOfPreferredStock" id="radh_ExtinguishmentOfPreferredStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="DilutiveEffectOfCommonSharesAttributableToShareBasedPaymentArrangementsPerShare" id="radh_DilutiveEffectOfCommonSharesAttributableToShareBasedPaymentArrangementsPerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DilutiveEffectOfCommonSharesAttributableToConversionOfPreferredStockPerShare" id="radh_DilutiveEffectOfCommonSharesAttributableToConversionOfPreferredStockPerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="WorkStatementMember" id="radh_WorkStatementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockIssuanceAgreementMember" id="radh_StockIssuanceAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NordicMember" id="radh_NordicMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementFinalPaymentsNumberOfEuroDenominatedInstallments" id="radh_CollaborativeAgreementFinalPaymentsNumberOfEuroDenominatedInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementFinalPaymentsNumberOfUSDollarDenominatedInstallments" id="radh_CollaborativeAgreementFinalPaymentsNumberOfUSDollarDenominatedInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquitySharesAgreedToBePurchasedValue" id="radh_TemporaryEquitySharesAgreedToBePurchasedValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromIssuanceOfTemporaryEquity" id="radh_ProceedsFromIssuanceOfTemporaryEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityValueOfQuarterlyStockDividendPayableInShares" id="radh_TemporaryEquityValueOfQuarterlyStockDividendPayableInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementAmountOfEuroDenominatedPaymentsRequiredOverCourseOfClinicalStudy" id="radh_CollaborativeAgreementAmountOfEuroDenominatedPaymentsRequiredOverCourseOfClinicalStudy" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementAmountOfUSdollarDenominatedPaymentsRequiredOverCourseOfClinicalStudy" id="radh_CollaborativeAgreementAmountOfUSdollarDenominatedPaymentsRequiredOverCourseOfClinicalStudy" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityNumberOfSharesDue" id="radh_TemporaryEquityNumberOfSharesDue" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="DomesticCorporateCommercialPaperMember" id="radh_DomesticCorporateCommercialPaperMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PerPatientCostsForEnrolledPatientsMember" id="radh_PerPatientCostsForEnrolledPatientsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PassThroughCostsMember" id="radh_PassThroughCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AfterPaymentInFullOfRequiredSeriesA1PreferredDividendsMember" id="radh_AfterPaymentInFullOfRequiredSeriesA1PreferredDividendsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AfterPaymentInFullOfRequiredSeriesA1AndSeriesA2PreferredDividendsMember" id="radh_AfterPaymentInFullOfRequiredSeriesA1AndSeriesA2PreferredDividendsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AfterPaymentInFullOfRequiredDividendsToHoldersOfSeriesCStockMember" id="radh_AfterPaymentInFullOfRequiredDividendsToHoldersOfSeriesCStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesCPreferredStockholdersMember" id="radh_LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesCPreferredStockholdersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesCAndSeriesBPreferredStockholdersMember" id="radh_LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesCAndSeriesBPreferredStockholdersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersMember" id="radh_LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesA1PreferredStockholdersMember" id="radh_LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesA1PreferredStockholdersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesA1AndSeriesA2PreferredStockholdersMember" id="radh_LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesA1AndSeriesA2PreferredStockholdersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesA1SeriesA2SeriesA3SeriesA5AndSeriesA6PreferredStockholdersMember" id="radh_LiquidationDissolutionOrWindingUpPaymentsToPreferredStockholdersAfterDistributionToSeriesA1SeriesA2SeriesA3SeriesA5AndSeriesA6PreferredStockholdersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ResearchAndDevelopmentTypeOfCostDomain" id="radh_ResearchAndDevelopmentTypeOfCostDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ResearchAndDevelopmentCostByTypeOfCostAxis" id="radh_ResearchAndDevelopmentCostByTypeOfCostAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OrganizationAndBusinessDescriptionDisclosureAbstract" id="radh_OrganizationAndBusinessDescriptionDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PreferredStockholderVotingRightsNumberOfClassesTogetherWithCommonStockholders" id="radh_PreferredStockholderVotingRightsNumberOfClassesTogetherWithCommonStockholders" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockDividendAssetFairValueDisclosure" id="radh_StockDividendAssetFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DebtInstrumentFinalPaymentFeesPercentage" id="radh_DebtInstrumentFinalPaymentFeesPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PrepaymentFeeAsPercentageOfAmountPrepaidIfPrepaymentOccursPriorToFirstAnniversaryOfFunding" id="radh_PrepaymentFeeAsPercentageOfAmountPrepaidIfPrepaymentOccursPriorToFirstAnniversaryOfFunding" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PrepaymentFeeAsPercentageOfAmountPrepaidIfPrepaymentOccursBetweenFirstAndSecondAnniversaryOfFunding" id="radh_PrepaymentFeeAsPercentageOfAmountPrepaidIfPrepaymentOccursBetweenFirstAndSecondAnniversaryOfFunding" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PrepaymentFeeAsPercentageOfAmountPrepaidIfPrepaymentOccursOnOrAfterSecondAnniversaryOfFunding" id="radh_PrepaymentFeeAsPercentageOfAmountPrepaidIfPrepaymentOccursOnOrAfterSecondAnniversaryOfFunding" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ClassOfWarrantOrRightPeriodForRecognitionOfDiscount" id="radh_ClassOfWarrantOrRightPeriodForRecognitionOfDiscount" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongTermDebtCurrentGross" id="radh_LongTermDebtCurrentGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="DebtInstrumentUnamortizedDiscountCurrent" id="radh_DebtInstrumentUnamortizedDiscountCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DebtInstrumentUnamortizedDiscountLongTerm" id="radh_DebtInstrumentUnamortizedDiscountLongTerm" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="ScheduleOfSharesOfCommonStockReservedTableTextBlock" id="radh_ScheduleOfSharesOfCommonStockReservedTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossNetOfTaxRollForward" id="radh_AccumulatedOtherComprehensiveIncomeLossNetOfTaxRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MoneyMarketFundsFairValueDisclosure" id="radh_MoneyMarketFundsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="CollaborativeAgreementAdditionalResearchAndDevelopmentExpense" id="radh_CollaborativeAgreementAdditionalResearchAndDevelopmentExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NotesPayableToBanksTermLoanAMember" id="radh_NotesPayableToBanksTermLoanAMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NotesPayableToBanksTermLoanBMember" id="radh_NotesPayableToBanksTermLoanBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NotesPayableToBanksTermLoanCMember" id="radh_NotesPayableToBanksTermLoanCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentMaximumBorrowingLimit" id="radh_DebtInstrumentMaximumBorrowingLimit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="DebtInstrumentExpectedIncreaseAdditionalBorrowings" id="radh_DebtInstrumentExpectedIncreaseAdditionalBorrowings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="DebtInstrumentFixedInterestRateBasisTenure" id="radh_DebtInstrumentFixedInterestRateBasisTenure" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentMonthlyPrincipalRepaymentsNumber" id="radh_DebtInstrumentMonthlyPrincipalRepaymentsNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentMonthlyInterestRepaymentsNumber" id="radh_DebtInstrumentMonthlyInterestRepaymentsNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GrantsReceivedByEntityUnderQualifyingTherapeuticDiscoveryGrantProgramNumber" id="radh_GrantsReceivedByEntityUnderQualifyingTherapeuticDiscoveryGrantProgramNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentUnpaidPrincipalAccruedAndUnpaidInterestPaymentTermAfterFundingOfDebt" id="radh_DebtInstrumentUnpaidPrincipalAccruedAndUnpaidInterestPaymentTermAfterFundingOfDebt" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentInterestRateAddedToFixedInterestRateBasis" id="radh_DebtInstrumentInterestRateAddedToFixedInterestRateBasis" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PaymentOfInterestOnlyPortionOfDebtFromFundingOfDebtPeriod" id="radh_PaymentOfInterestOnlyPortionOfDebtFromFundingOfDebtPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentInterestRateIncreaseUponEventOfDefault" id="radh_DebtInstrumentInterestRateIncreaseUponEventOfDefault" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ClassOfWarrantOrRightTermOfWarrants" id="radh_ClassOfWarrantOrRightTermOfWarrants" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PaymentsOfDebtReimbursementCosts" id="radh_PaymentsOfDebtReimbursementCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RecapitalizationTable" id="radh_RecapitalizationTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForcedConversionMember" id="radh_ForcedConversionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StageOneAndTwoMember" id="radh_StageOneAndTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StageOneMember" id="radh_StageOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StageTwoMember" id="radh_StageTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StageThreeMember" id="radh_StageThreeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RecapitalizationMember" id="radh_RecapitalizationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StatementOfClassOfStockIssuedUponConversionAxis" id="radh_StatementOfClassOfStockIssuedUponConversionAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StatementOfClassOfStockIssuedUponConversionDomain" id="radh_StatementOfClassOfStockIssuedUponConversionDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FinancingStageAxis" id="radh_FinancingStageAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FinancingStageDomain" id="radh_FinancingStageDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SubleaseRentalsPayableMonthly" id="radh_SubleaseRentalsPayableMonthly" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="OperatingLeasesMonthlyRentalsPayableFirstTwelveMonths" id="radh_OperatingLeasesMonthlyRentalsPayableFirstTwelveMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="OperatingLeasesMonthlyRentalsPayableSubsequentTwentyfourMonths" id="radh_OperatingLeasesMonthlyRentalsPayableSubsequentTwentyfourMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxReconciliationNondeductibleExpensePermanentItems" id="radh_IncomeTaxReconciliationNondeductibleExpensePermanentItems" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DeferredTaxAssetsCapitalizedResearchAndDevelopment" id="radh_DeferredTaxAssetsCapitalizedResearchAndDevelopment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="QualifyingTherapeuticDiscoveryGrantProgramAbstract" id="radh_QualifyingTherapeuticDiscoveryGrantProgramAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPropertyPlantAndEquipmentComponentsTableTextBlock" id="radh_ScheduleOfPropertyPlantAndEquipmentComponentsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ComputerEquipmentAndSoftwareMember" id="radh_ComputerEquipmentAndSoftwareMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConcentrationRiskCreditRiskAndOffBalanceSheetRiskPolicyTextBlock" id="radh_ConcentrationRiskCreditRiskAndOffBalanceSheetRiskPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TemporaryEquityDisclosurePolicyTextBlock" id="radh_TemporaryEquityDisclosurePolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NatureOfBusinessTable" id="radh_NatureOfBusinessTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IssuanceOfStockTranchesNumber" id="radh_IssuanceOfStockTranchesNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BusinessAcquisitionAcquirerAxis" id="radh_BusinessAcquisitionAcquirerAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockholdersEquityReverseStockSplitRatio" id="radh_StockholdersEquityReverseStockSplitRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationStockConversionRatio" id="radh_BusinessCombinationStockConversionRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockIssuableDuringPeriodSharesNewIssuesPreferredStock" id="radh_StockIssuableDuringPeriodSharesNewIssuesPreferredStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeArrangementsDeterminationOfSharesIssuablePriorToNumberOfDaysOfClosing" id="radh_CollaborativeArrangementsDeterminationOfSharesIssuablePriorToNumberOfDaysOfClosing" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfOutstandingTemporaryEquitySharesHoldersVoteRequiredForRedemption" id="radh_PercentageOfOutstandingTemporaryEquitySharesHoldersVoteRequiredForRedemption" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PeriodOfHoldingOutstandingTemporaryEquityFromDateOfIssuanceForRedemption" id="radh_PeriodOfHoldingOutstandingTemporaryEquityFromDateOfIssuanceForRedemption" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PeriodOfBreachAfterWhichMaturityOfRightsCanBeAcceleratedByOutstandingTemporaryEquityShareholders" id="radh_PeriodOfBreachAfterWhichMaturityOfRightsCanBeAcceleratedByOutstandingTemporaryEquityShareholders" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfGeographicSegments" id="radh_NumberOfGeographicSegments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmployeeMember" id="radh_EmployeeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPreferredStockTableTextBlock" id="radh_ScheduleOfPreferredStockTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsNumberOfVariablesUsedInEstimatingFairValueOfOptions" id="radh_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsNumberOfVariablesUsedInEstimatingFairValueOfOptions" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FurnitureMember" id="radh_FurnitureMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AvailableForSaleSecuritiesRemainingContractualTerm" id="radh_AvailableForSaleSecuritiesRemainingContractualTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BA058SCPhase3ClinicalStudyMember" id="radh_BA058SCPhase3ClinicalStudyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BA058TDPhase2ClinicalStudyMember" id="radh_BA058TDPhase2ClinicalStudyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BasisOfPresentationDisclosureAbstract" id="radh_BasisOfPresentationDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ClinicalStudyByPhaseAxis" id="radh_ClinicalStudyByPhaseAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ClinicalStudyByPhaseDomain" id="radh_ClinicalStudyByPhaseDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementAdditionalPaymentsValueOfSharesToBeIssued" id="radh_CollaborativeAgreementAdditionalPaymentsValueOfSharesToBeIssued" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementAmountPayableToCollaborator" id="radh_CollaborativeAgreementAmountPayableToCollaborator" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementAmountPayableToCollaboratorForAdditionalStudySites" id="radh_CollaborativeAgreementAmountPayableToCollaboratorForAdditionalStudySites" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementEstimatedNumberOfQuarterlyPeriodsRequiredToCompleteTheClinicalStudy" id="radh_CollaborativeAgreementEstimatedNumberOfQuarterlyPeriodsRequiredToCompleteTheClinicalStudy" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="CollaborativeAgreementNumberOfAdditionalCountriesWhereStudyWillBeConducted" id="radh_CollaborativeAgreementNumberOfAdditionalCountriesWhereStudyWillBeConducted" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementNumberOfAdditionalSitesForStudy" id="radh_CollaborativeAgreementNumberOfAdditionalSitesForStudy" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementNumberOfCountriesWhereStudyWasToBeConducted" id="radh_CollaborativeAgreementNumberOfCountriesWhereStudyWasToBeConducted" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CollaborativeAgreementNumberOfSharesDueAfterConversion" id="radh_CollaborativeAgreementNumberOfSharesDueAfterConversion" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="CollaborativeAgreementReductionInAmountOfEuroDenominatedPaymentsRequiredOverCourseOfClinicalStudy" id="radh_CollaborativeAgreementReductionInAmountOfEuroDenominatedPaymentsRequiredOverCourseOfClinicalStudy" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CountryAxis" id="radh_CountryAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtRepaymentFinalBalloonPayment" id="radh_DebtRepaymentFinalBalloonPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermPreTaxOperatingMarginPercentageYearsScenarioOne" id="radh_FairValueInputsLongTermPreTaxOperatingMarginPercentageYearsScenarioOne" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermPreTaxOperatingMarginPercentageYearsScenarioTwo" id="radh_FairValueInputsLongTermPreTaxOperatingMarginPercentageYearsScenarioTwo" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermPretaxOperatingMarginPercentageScenarioOne" id="radh_FairValueInputsLongTermPretaxOperatingMarginPercentageScenarioOne" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermPretaxOperatingMarginPercentageScenarioTwo" id="radh_FairValueInputsLongTermPretaxOperatingMarginPercentageScenarioTwo" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermRevenueGrowthRateScenarioOne" id="radh_FairValueInputsLongTermRevenueGrowthRateScenarioOne" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermRevenueGrowthRateScenarioTwo" id="radh_FairValueInputsLongTermRevenueGrowthRateScenarioTwo" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermRevenueGrowthRateYearsScenarioOne" id="radh_FairValueInputsLongTermRevenueGrowthRateYearsScenarioOne" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsLongTermRevenueGrowthRateYearsScenarioTwo" id="radh_FairValueInputsLongTermRevenueGrowthRateYearsScenarioTwo" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsProbabilityOfBA058ComingToMarket" id="radh_FairValueInputsProbabilityOfBA058ComingToMarket" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueInputsTimeToBecomingListedPubliclyTradedEntity" id="radh_FairValueInputsTimeToBecomingListedPubliclyTradedEntity" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LetterOfIntentMember" id="radh_LetterOfIntentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ProbabilityWeightedExpectedReturnMethodMember" id="radh_ProbabilityWeightedExpectedReturnMethodMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockDividendAssetFairValue" id="radh_StockDividendAssetFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="TemporaryToPermanentEquityConversionRatioUponFailureToFullfillFutureFundingObligation" id="radh_TemporaryToPermanentEquityConversionRatioUponFailureToFullfillFutureFundingObligation" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="UnrealizedGainLossOnFairValueOfWarrantLiabilityOtherAssetsAndLiability" id="radh_UnrealizedGainLossOnFairValueOfWarrantLiabilityOtherAssetsAndLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="WorkStatementFirstAmendmentToNordicAgreementMember" id="radh_WorkStatementFirstAmendmentToNordicAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="WorkStatementSecondAmendmentToNordicAgreementMember" id="radh_WorkStatementSecondAmendmentToNordicAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
</xsd:schema>
