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</LabelSeparator><Level>2</Level><ElementName>us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>verboseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="c20130101to20130630" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt;"&gt;&lt;div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font-family: times new roman; font-size: 10pt;"&gt;&lt;tr&gt;&lt;td align="left" valign="top" style="width: 9%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: Times New Roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;NOTE 7.&lt;/div&gt;&lt;/td&gt;&lt;td align="left" valign="top" style="width: 91%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: Times New Roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;PROPERTY, EQUIPMENT and LEASEHOLD IMPROVEMENTS&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="text-indent: 0pt; display: block;"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="text-align: justify; text-indent: 0pt; display: block; font-family: Times New Roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Property, equipment and leasehold improvements, net, consisted of the following at June 30, 2013 and December 31, 2012:&lt;/div&gt;&lt;div style="text-indent: 0pt; display: block;"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font-family: times new roman; font-size: 10pt;"&gt;&lt;tr&gt;&lt;td align="left" valign="bottom" style="border-bottom: black 2px solid;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;Property, equipment and leasehold improvements&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 2px; font-family: times new roman; font-size: 10pt; font-weight: bold;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" colspan="2" valign="bottom" style="border-bottom: black 2px solid;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;June 30, 2013&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; font-family: times new roman; font-size: 10pt; font-weight: bold;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 2px; font-family: times new roman; font-size: 10pt; font-weight: bold;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" colspan="2" valign="bottom" style="border-bottom: black 2px solid;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;December 31, 2012&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; font-family: times new roman; font-size: 10pt; font-weight: bold;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td align="left" valign="bottom" style="width: 76%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Laboratory equipment&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;$&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;424,888&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;$&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;424,888&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td align="left" valign="bottom" style="width: 76%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Manufacturing equipment&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;1,542,635&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;1,547,572&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td align="left" valign="bottom" style="width: 76%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Computers, office equipment, and furniture&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;140,360&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;140,360&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td align="left" valign="bottom" style="width: 76%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Computer software&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;4,108&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;4,108&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td align="left" valign="bottom" style="padding-bottom: 2px; width: 76%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Leasehold improvements&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;95,841&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;95,841&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td valign="bottom" style="width: 76%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;2,207,832&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;2,212,769&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td align="left" valign="bottom" style="padding-bottom: 2px; width: 76%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Less: accumulated depreciation and amortization&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;( 1,489,455&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;)&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;(1,367,234&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;)&lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td align="left" valign="bottom" style="padding-bottom: 4px; width: 76%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Property, equipment and leasehold improvements, net&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 4px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 4px double; text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;$&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 4px double; text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;718,377&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 4px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td align="right" valign="bottom" style="padding-bottom: 4px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 4px double; text-align: left; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;$&lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 4px double; text-align: right; width: 9%; font-family: times new roman; font-size: 10pt;"&gt;845,535&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 4px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="text-indent: 0pt; display: block;"&gt;&lt;br /&gt;&lt;/div&gt;&lt;div style="text-align: justify; text-indent: 0pt; display: block; font-family: Times New Roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Depreciation expense on property, equipment and leasehold improvements was $60,460 and $75,212 for the three months ended June 30, 2013 and 2012, respectively, and was $125,848 and $150,473 for the six months ended June 30, 2013 and 2012, respectively.&lt;/div&gt;&lt;div style="text-indent: 0pt; 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