1. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine The Catholic University of Korea Seoul South Korea
2. Cardiovascular Research Institute for Intractable Disease, College of Medicine The Catholic University of Korea Seoul South Korea
3. Division of Endocrinology and Metabolism, Department of Internal Medicine, St. Vincent's Hospital, College of Medicine The Catholic University of Korea Seoul South Korea
4. Division of Cardiology, Department of Internal Medicine, St. Vincent's Hospital, College of Medicine The Catholic University of Korea Seoul South Korea
5. Division of Cardiology, Department of Internal Medicine, Bucheon St. Mary's Hospital The Catholic University of Korea Seoul South Korea