The undersigned, Deerfield Mgmt, L.P., Deerfield Management Company, L.P., Deerfield Special Situations Fund, L.P., Deerfield Special Situations International Master Fund, L.P., Deerfield Private Design Fund II, L.P. and Deerfield Private Design International II, L.P. are jointly filing the attached Initial Statement of Beneficial Ownership on Form 3 with James E. Flynn with respect to the beneficial ownership of securities of Dicerna Pharmaceuticals, Inc.
Signatures:
DEERFIELD MGMT, L.P.
By: J.E. Flynn Capital LLC, General Partner
By: /s/ Jonathan Isler
Jonathan Isler, Attorney-In-Fact
DEERFIELD MANAGEMENT COMPANY, L.P.
By: Flynn Management LLC, General Partner
By: /s/ Jonathan Isler
Jonathan Isler, Attorney-In-Fact
DEERFIELD SPECIAL SITUATIONS FUND, L.P.
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital LLC, General Partner
By: /s/ Jonathan Isler
Jonathan Isler, Attorney-In-Fact
DEERFIELD SPECIAL SITUATIONS INTERNATIONAL MASTER FUND, L.P.
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital LLC, General Partner
By: /s/ Jonathan Isler
Jonathan Isler, Attorney-In-Fact
DEERFIELD PRIVATE DESIGN FUND II, L.P.
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital, LLC, General Partner
By: /s/ Jonathan Isler
Jonathan Isler, Attorney-In-Fact
DEERFIELD PRIVATE DESIGN INTERNATIONAL II, L.P.
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital, LLC, General Partner
By: /s/ Jonathan Isler
Jonathan Isler, Attorney-In-Fact