1. From the Division of Cardiology, Severance Cardiovascular Hospital (J.C., R.H., G.-R.H., H.-J.C., S.H.S., I.J.C., C.-Y.S., N.C.) and Severance Biomedical Science Institute (H.-J.C.), Yonsei University Health System, Seoul, South Korea; and Department of Statistics, Graduate School of Health and Welfare, CHA University, Seongnam, South Korea (J.M.S.).