Joint Filing AgreementJoint Filing Agreement • April 20th, 2012 • Biotechnology Value Fund L P • Investment advice
The undersigned hereby agree that the Statement on Schedule 13G dated April 20, 2012 with respect to the shares of Common Stock of Pain Therapeutics, Inc., and any amendments thereto executed by each and any 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)(1) under the Securities Exchange Act of 1934, as amended.
