1. Division of Cardiology, Department of Internal Medicine, Severance Hospital; Yonsei University College of Medicine; Seoul Korea
2. Cardiology Division, Department of Internal Medicine, Haeundae Paik Hospital; Inje University College of Medicine; Busan Korea
3. Cardiovascular Center; Dongguk University Ilsan Hospital; Goyang Korea
4. Division of Cardiology, Department of Internal Medicine, Gangnam Severance Hospital; Yonsei University College of Medicine; Seoul Korea
5. Heart Center of Chonnam National University Hospital; Gwangju Korea
6. Cardiology Division, Department of Internal Medicine, Kangwon National University Hospital; Kangwon National University College of Medicine; Chunchon, Korea
7. Endocrinology Division, Department of Internal Medicine; Kyunghee University School of Medicine; Seoul Korea
8. Cardiology Division, Department of Internal Medicine; Keimyung University Dongsan Medical Center; Daegu Korea
9. Cardiology Division, Department of Internal Medicine, School of Medicine, Chungnam National University; Chungnam National University Hospital; Daejeon Korea
10. Cardiovascular Research Institute; Yonsei University College of Medicine; Seoul Korea