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William G. Roberts, M.D, 48, has been Vice President, Regulatory Development since May 1999. From 1993 until joining the Company, Dr. Roberts was employed by Merck & Co., Inc. as an Associate Director, Gastroenterology Clinical Research and, subsequently, Director, Regulatory Affairs. He received his M.D. from the Columbia University College of Physicians & Surgeons. Dr. Roberts is a son-in-law of our Chairman, Dr. Vagelos. | 