Institution: | 1. Department of Cardiology, Cardiovascular Center, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, South Korea;2. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea;3. Division of Cardiology, Hallym Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Gyeonggi, South Korea;4. Cardiovascular Center and Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea;5. Department of Cardiology, Internal Medicine, Chungnam National University Hospital, Daejeon, South Korea |