Executive Profiles

William R. Rohn, President and Chief Operating Officer, joined the Company in August 1993 as Senior Vice President, Commercial and Corporate Development. Mr. Rohn was appointed Senior Vice President, Commercial Operations in April 1996 and was promoted to Chief Operating Officer in May 1998, overseeing Sales, Marketing, Business Development, Biopharmaceutical Sciences, Manufacturing and Process Sciences, Quality and Legal. In January 2002, Mr. Rohn was promoted to President. In addition to his current duties, he will take on responsibility for chemistry, manufacturing and controls (CMC) and regulatory affairs.

Currently, Mr. Rohn serves on the board of directors of Pharmacyclics, a pharmaceutical company developing energy-potentiating drugs to improve radiation therapy and chemotherapy of cancer, and to enable or improve the photodynamic therapy of certain cancers and atherosclerotic cardiovascular disease. In April 2002, Mr. Rohn joined the board of directors of Ceres Corporation. Cerus is developing medical systems and therapeutics based on its proprietary Helinx® technology for controlling biological replication.

Prior to joining the Company, Mr. Rohn was employed by Adria Laboratories, now part of Pharmacia Corporation, from 1984 until 1993, most recently as Senior Vice President of Sales and Marketing with responsibilities for strategic and commercial partnerships as well as sales and marketing functions in the United States. Prior to Adria, Mr. Rohn held marketing and sales management positions at Abbott Laboratories, Warren-Teed Pharmaceuticals, Miles Laboratories and Mead Johnson Laboratories. Mr. Rohn received a B.A. in Marketing from Michigan State University.