13D Filing: James E. Flynn and Homology Medicines Inc (FIXX)

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Page 17 of 20 – SEC Filing

CUSIP No.  438083107 Page 17 of 18 Pages

SIGNATURE

After reasonable inquiry
and to the best of their knowledge and belief, the undersigned certify that the information set forth in this statement is true,
complete and correct.


Dated: April 6, 2018

DEERFIELD
MGMT III, L.P.

By: J.E. Flynn Capital III, LLC, General Partner

By:
/s/ Jonathan Isler

Name:
Jonathan Isler

Title:   Attorney-in-Fact

DEERFIELD
PRIVATE DESIGN FUND III, L.P.

By:
Deerfield Mgmt III, L.P., General Partner

By: J.E. Flynn Capital III, LLC, General Partner

By:
/s/ Jonathan Isler

Name:
Jonathan Isler

Title:   Attorney-in-Fact

DEERFIELD
MGMT HIF, L.P.

By: J.E. Flynn Capital HIF, LLC, General Partner

By:
/s/ Jonathan Isler

       Jonathan Isler, Attorney-In-Fact

DEERFIELD
HEALTHCARE INNOVATIONS FUND, L.P.

By:
Deerfield Mgmt HIF, L.P., General Partner

By: J.E. Flynn Capital HIF, LLC, General Partner

By:
/s/ Jonathan Isler

       Jonathan Isler, Attorney-In-Fact

DEERFIELD
PARTNERS, L.P.

By:
Deerfield Mgmt, L.P., General Partner

By: J.E. Flynn Capital, LLC, General Partner

By:
/s/ Jonathan Isler

Name:
Jonathan Isler

Title:   Attorney-in-Fact

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