From the Department of Cardiology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Korea (G.-M.P., S.H.H.); Departments of Biostatistics (S.H., J.B.L., M.S.L.), Preventive Medicine (M.-W.J.), Cardiology, (J.-M.A., S.-W.L., Y.-H.K., S.-W.P., S,-J.P.), Endocrinology and Metabolism (B.-J.K., J.-M.K.), and Health Screening and Promotion Center (H.-K.K., J.C.), Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Department of Nursing, College of Medicine, Dankook University, Cheonan, Korea (S.H.K.); Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea (H.C.K.); and Research and Development Center, Health Insurance Review and Assessment Service, Seoul, Korea (H.C.K.). From the Department of Cardiology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Korea (G.-M.P., S.H.H.); Departments of Biostatistics (S.H., J.B.L., M.S.L.), Preventive Medicine (M.-W.J.), Cardiology, (J.-M.A., S.-W.L., Y.-H.K., S.-W.P., S,-J.P.), Endocrinology and Metabolism (B.-J.K., J.-M.K.), and Health Screening and Promotion Center (H.-K.K., J.C.), Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Department of Nursing, College of Medicine, Dankook University, Cheonan, Korea (S.H.K.); Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea (H.C.K.); and Research and Development Center, Health Insurance Review and Assessment Service, Seoul, Korea (H.C.K.). mdyhkim@amc.seoul.kr drchoe@hotmail.com.