1. From the Department of Cardiology (J.-Y. L., D.-W.P., Y.-H.K., J.-M.A., W.-J.K., S.-J.K., S.-W.L., C.W.L., S.-W.P., S.-J.P.) and Division of Biostatistics, Center for Medical Research and Information (S.-C.Y.), University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; Department of Internal Medicine, Inje University Pusan Paik Hospital, Pusan, Korea (T.-H.Y.); Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Korea (B.-K.L.); Department of Internal...