1. Division of Cardiology, Department of Internal Medicine, Chosun University Hospital, Gwangju, Korea.
2. Division of Cardiology, Department of Internal Medicine, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
3. Division of Cardiology, Department of Internal Medicine, Gyeongsang National University Hospital, Jinju, Korea.
4. Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Hospital Gumi, Gumi, Korea.
5. Division of Cardiology, Presbyterian Medical Center, Jeonju, Korea.
6. Division of Cardiology, Department of Internal Medicine, Daegu Catholic University Medical Center, Daegu, Korea.
7. Division of Cardiology, Department of Internal Medicine, Yeungnam University Medical Center, Daegu, Korea.
8. Division of Cardiology, Department of Internal Medicine, Dong-A University Hospital, Busan, Korea.
9. Division of Cardiology, Department of Internal Medicine, Inje University Busan Paik Hospital, Busan, Korea.
10. Division of Cardiology, Department of Internal Medicine, Wonkwang University Hospital, Iksan, Korea.
11. Division of Cardiology, Daegu Fatima Hospital, Daegu, Korea.
12. Division of Cardiology, Kwangju Christian Hospital, Gwangju, Korea.
13. Division of Cardiology, Department of Internal Medicine, Ulsan University Hospital, Ulsan, Korea.
14. Division of Cardiology, Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea.
15. Division of Cardiology, St. Carollo Hospital, Suncheon, Korea.
16. Division of Cardiology, Department of Internal Medicine, Pusan National University Hospital, Busan, Korea.
17. Division of Cardiology, Department of Internal Medicine, Chonbuk National University Hospital, Jeonju, Korea.
18. Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Hospital, Daegu, Korea.
19. Division of Cardiology, Gwangju Veterans Hospital, Gwangju, Korea.
20. Division of Cardiology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Korea.
21. Division of Cardiology, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Busan, Korea.