1. From the Department of Internal Medicine, Division of Cardiovascular Diseases, University of Iowa–Roy J. and Lucille A. Carver College of Medicine (P.A.H.), Iowa City, Iowa; Department of Medicine, Division of Cardiovascular Medicine, University of Pennsylvania School of Medicine (E.J.T., J.M.G., J.J.L., M.S.P., A.C.K., S.S.D., L.R.G., S.C.B., M.L.J., J.A.E., T.P.C.), Philadelphia, Pa; and Division of Biostatistics, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania (M.E...