1. Division of Cardiology, Department of Internal Medicine, College of Medicine, Seoul National University
2. Department of Internal Medicine, Sejong General Hospital
3. Division of Cardiology, Department of Internal Medicine, College of Medicine, Daegu Catholic University
4. Division of Cardiology, Department of Internal Medicine, College of Medicine, Chonnam National University
5. Busan Hanseo Hospital
6. Division of Cardiology, Kyungpook National University Hospital
7. Division of Cardiology, Yeungnam University Medical Center
8. Division of Cardiology, Keimyung University Dongsan Medical Center
9. Division of Cardiology, Chungnam National University Hospital
10. Division of Cardiology, Yonsei University Severans Hospital
11. Division of Cardiology, Pusan National University Hospital
12. Division of Cardiology, Chonbuk National University Hospital
13. Jeonju Presbyterian Medical Center