1. From the Department of Cardiology (S.-J.K., J.-M.A., H.S., W.-J.K., J.-Y.L., D.-W.P., S.-W.L., Y.-H.K., C.W., S.-W.P., S.-J.P.) and the Department of Biostatistics (S.-C.Y.), University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea; and the Cardiovascular Research Foundation, New York, NY (G.S.M.).