Affiliation: | 1. Division of Cardiology, Department of Internal Medicine, Gwangju Veterans Hospital, Republic of Korea;2. Department of Cardiovascular Medicine, Kyung Hee University College of Medicine, Seoul, Republic of Korea;3. Department of Cardiovascular Medicine, Chonnam National University College of Medicine, Gwangju, Republic of Korea;4. Division of Cardiology, Department of Internal Medicine, Busan Veterans Hospital, Republic of Korea |