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Roy A. Whitfield co-founded the Company and served as Chairman of the Board from November 2001 until June 2003. Mr. Whitfield served as Chief Executive Officer of the Company between June 1993 and November 2001, as President of the Company from June 1991 until January 1997, and as Treasurer of the Company between April 1991 and October 1995. Previously, Mr. Whitfield served as the President of Ideon Corporation, which was a majority-owned subsidiary of Invitron Corporation, a biotechnology company, from October 1989 until April 1991. From 1984 to 1989, he held senior operating and business development positions with Technicon Instruments Corporation, a medical instrumentation company, and its predecessor company, Cooper Biomedical, Inc., a biotechnology and medical diagnostics company. Prior to his work at Technicon, Mr. Whitfield spent seven years with the Boston Consulting Group�s international consulting practice. He also serves as a director of Nektar Therapeutics and several privately held companies. | 