1. Division of Cardiology, Department of Internal Medicine, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea.
3. Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Korea University Anam Hospital, Seoul, Korea.
4. Heart Center of Chonnam National University Hospital, Gwangju, Korea.
5. Cardiology, Cardiovascular Center, Sejong General Hospital, Bucheon, Korea.
6. Division of Cardiology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
7. Department of Cardiology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
8. Division of Cardiology, Department of Internal Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Busan, Korea.
9. Department of Medicine, Yeungnam University Hospital, Daegu, Korea.
10. Department of Cardiology, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
11. Division of Cardiology, Heart Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
12. Cardiology, Gachon University Gil Medical Center, Incheon, Korea.
13. Division of Cardiology, Department of Internal Medicine, Chonbuk National University Hospital, Jeonju, Korea.
14. Department of Cardiology, Ajou University Medical Center, Suwon, Korea.
15. Department of Cardiology, Busan Paik Hospital, University of Inje College of Medicine, Busan, Korea.
16. Cardiovascular Center, Division of Cardiology, Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
17. Department of Internal Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea.
18. Division of Cardiology, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
19. Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, Korea.
20. Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Korea.
21. Department of Internal Medicine, Cardiology Centre, Seoul National University Hospital, Seoul, Korea.