ContractJoint Filing Agreement • December 22nd, 2009 • Southpaw Asset Management LP • In vitro & in vivo diagnostic substances
The undersigned hereby agree that the Schedule 13G with respect to the shares of common stock of Avigen, Inc., dated as of December 21, 2009, is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934.
