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, Gwangju, Korea.
3. Division of Cardiology, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Busan, Korea.
4. Division of Cardiology, Department of Internal Medicine, Chung-Ang University Hospital, Seoul, Korea.
5. Division of Cardiology, Department of Internal Medicine, Kyung Hee University Hospital, Seoul, Korea.
6. Division of Cardiology, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Korea.
7. Division of Cardiology, Department of Internal Medicine, Presbyterian Medical Center, Jeonju, Korea.
8. Division of Cardiology, Department of Internal Medicine, Yeungnam University Hospital, Daegu, Korea.
9. Division of Cardiology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Korea.
10. Division of Cardiology, Department of Internal Medicine, Konyang University Hospital, Daejeon, Korea.
11. Division of Cardiology, Department of Internal Medicine, College of Medicine, Chungbuk National University, Cheongju, Korea.
12. Division of Cardiology, Department of Internal Medicine, Wonkwang University Hospital, Iksan, Korea.
13. Division of Cardiology, Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, Korea.
14. Division of Cardiology, Department of Internal Medicine, Gwangju Christian Hospital, Gwangju, Korea.
15. Division of Cardiology, Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Korea.
16. Division of Cardiology, Department of Internal Medicine, Korea University Ansan Hospital, Ansan, Korea.
17. Division of Cardiology, Department of Internal Medicine, Saint Carollo Hospital, Suncheon, Korea.
18. Division of Cardiology, Department of Internal Medicine, Pusan National University Hospital, Busan, Korea.
19. Division of Cardiology, Department of Internal Medicine, Chonbuk National University Hospital, Jeonju, Korea.
20. Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Hospital, Daegu, Korea.
21. Division of Cardiology, Department of Internal Medicine, Gwangju Veterans Hospital, Gwangju, Korea.
22. Division of Cardiology, Department of Internal Medicine, Gyeongsang National University Hospital, Jinju, Korea.