1 Eun Hyo Jin, MD, PhD, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea, and Department of Internal Medicine, Healthcare Research Institute, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea; Kyungdo Han, PhD, Department of Statistics and Actuarial Science, Soongsil University, Seoul, Korea; and Cheol Min Shin, MD, PhD, Department of Internal Medicine, Healthcare Research Institute, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea, and Department of Internal Medicine and Seoul National University Bundang Hospital, Seongnam, Gyeonggido, Korea.