1. From the Department of Internal Medicine/Division of Cardiovascular Medicine, Gill Heart Institute (K.D.), University of Kentucky, Lexington; Department of Internal Medicine/Division of Cardiology, Geisinger Clinic (P.B.B., S.S.), Danville, Pa; Department of Internal Medicine/Division of Cardiology, Mid-American Heart Institute (S.M.), Kansas City, Mo; Department of Clinical Pathology (F.v.L.), and Department of Cardiovascular Medicine (D.M.B.), Cleveland Clinic, Ohio; Department of Biostatistics,...