MADISON, Wis.--(BUSINESS WIRE)--Exact Sciences Corp. (Nasdaq: EXAS) today announced the appointment of Graham P. Lidgard, Ph.D., as the company’s chief scientific officer. Dr. Lidgard, 60, brings more than three decades of clinical diagnostics experience to Exact. His past work includes molecular and immunoassay diagnostic product development, clinical trial preparation and execution, and preparation of successful pre-market approval, or PMA, and 510(k) submissions to the U.S. Food and Drug Administration.