1. From the Divisions of Cardiology (D.-W.P., D.-Y.K., J.-M.A., S.-J.P.) and Biostatistics (S.-C.Y.), Asan Medical Center, University of Ulsan College of Medicine, the Cardiovascular Center and Cardiology Division, Yeouido St. Mary’s Hospital (C.S.P.), and the Division of Cardiology, Eulji General Hospital (J.W.C.), Seoul, the Division of Cardiology, Chungnam National University Sejong Hospital, Sejong (Y.-H.Y.), the Division of Cardiology, Keimyung University Dongsan Hospital (S.-H.H., C.H.L.), and the...