1. Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine
2. Division of Cardiology, Department of Internal Medicine, Heart Center, Chonnam National University Hospital, Chonnam National University Medical School
3. Department of Internal Medicine and Cardiovascular Center, Chosun University Hospital, University of Chosun College of Medicine
4. Keimyung University Dongsan Medical Center
5. Department of Cardiology, Inje University Haeundae Baek Hospital, Inje University College of Medicine
6. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea
7. Department of Internal Medicine, Kyungpook National University Hospital
8. Department of Internal Medicine, College of Medicine, Chungbuk National University
9. Chungnam National University Hospital, Chungnam National University College of Medicine
10. Samsung Changwon Hospital, Sungkyunkwan University School of Medicine
11. Wonkwang University Hospital
12. Seoul National University Bundang Hospital
13. Chonbuk National University Hospital and Chonbuk National University Medical School
14. Department of Internal Medicine, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine
15. Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital