Dr. Nortin Hadler, M.D., M.A.C.P., F.A.C.R., F.A.C.O.E.M., professor of medicine and microbiology/immunology at the University if North Carolina at Chapel Hill and attending rheumatologist at UNC Hospitals. Author of "The Last Well PersonL How to Stay Well Despite the Health-Care System", his most recent book is "Worried Sick: A Prescription for Health in an Overtreated America" and the upcoming "Stabbed in the Back: Confronting Back Pain in an Overtreated Society".