Diana Sylvestre, MD, is a physician-researcher and faculty member in the department of medicine at the University of California, San Francisco. She is the executive director of the O.A.S.I.S. (Organization to Achieve Solutions in Substance-Abuse) in Oakland, California, and the president of the California Hepatitis Alliance. Her patient education workbook Hepatitis C: Get the Facts! has been distributed widely at no cost throughout the world.