1. From the Division of Cardiology, Department of Medicine, Cedars-Sinai Medical Center (Y.-H.K., M.Y., T.-J.W., M.V., M.-H.L., T.O., O.V., R.N.D., H.S.K., P.-S.C.), and the Division of Cardiology, Departments of Medicine, Physiology, and Physiological Science (F.X., Z.Q., A.G., J.N.W.) and Pathology (M.C.F.), UCLA School of Medicine, Los Angeles, Calif; and Korea University, Seoul, Korea (Y.-H.K.). Dr Kim is now at the Division of Cardiology, Department of Medicine, Korea University, Seoul, Korea.