1. From the Penn Cardiovascular Institute, University of Pennsylvania School of Medicine, Philadelphia, PA (B.K., B.F., L.R.G., M.J., T.P.C.); Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, PA (B.K., B.F.); the Division of Cardiology, University of Washington, Seattle, WA (W.C.L.); Cardiovascular Medicine, University of Wisconsin, Madison, WI (N.K.S.); Cardiovascular Medicine, Case Western Reserve University, Cleveland, OH (J.C.F.); and...