AGREEMENT TO JOINTLY FILE SCHEDULE 13DRosenwald Lindsay a Md • April 13th, 2006 • Blank checks
Company FiledApril 13th, 2006 IndustryThe undersigned hereby agree to jointly prepare and file with regulatory authorities a Schedule 13D and any future amendments thereto reporting each of the undersigned's ownership of securities of Cougar Biotechnology, Inc. and hereby affirm that such Schedule 13D is being filed on behalf of each of the undersigned.