1. Department of Biomedical Laboratory Science, Daegu Health College, South Korea (S.Y.C.).
2. Department of Cardiology, Dong-A University Hospital, Busan, South Korea (M.H.K., Y.-R.C., J.S.P., K.M.L., T.-H.P.).
3. Department of Clinical Epidemiology and Biostatistics, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea (S.-C.Y.).