1. From the Department of Cardiovascular Medicine, Cleveland Clinic, OH (A.R.M.S., B.L.W.); Department of Medicine, AtlantiCare Regional Medical Center, Atlantic City, NJ (V.Y.); Division of Cardiovascular Diseases, Cardiovascular Research Institute, University of Kansas Medical Center and Hospital, Kansas City (Y.M.R., D.L., B.D.); Department of Medicine, University of Kansas Medical Center, Kansas City (S.P.); and Virginia Commonwealth University, Richmond (D.P.).