Transaction Details

Footnotes

This Form 4 is filed by David Johnson ("Mr. Johnson") and Caligan Partners LP ("Caligan") with respect to the securities held by Caligan Partners Master Fund LP ("Caligan Master Fund"), a Cayman Islands limited partnership, and managed accounts ("Caligan Accounts", together with the Caligan Master Fund, the "Caligan Fund and Accounts") to which Caligan serves as investment manager. Mr. Johnson is the Managing Partner of Caligan and a Managing Member of Caligan Partners GP LLC, the general partner of Caligan. | Includes 9,088 shares of common stock that will be issued to Mr. Johnson upon vesting of restricted stock units. Mr. Johnson is deemed to hold the securities reported herein for the benefit of the Caligan Fund and Accounts, and may, after vesting, if applicable, transfer the securities directly to the Caligan Fund and Accounts.