Young Hoon Jeong1, Jong Hwa Ahn2, Eun Seok Shin3. 1. Department of Internal Medicine, Gyeongsang National University School of Medicine and Cardiovascular Center, Gyeongsang National University Changwon Hospital; Changwon-Republic of Kore. goodoctor@naver.com. 2. Department of Internal Medicine, Gyeongsang National University School of Medicine and Cardiovascular Center, Gyeongsang National University Changwon Hospital; Changwon-Republic of Kore. 3. Division of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine; Ulsan-Republic of Kore.