1. Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
2. Division of Cardiology, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Korea.
3. Division of Cardiology, Department of Internal Medicine, Dongtan Sacred Heart Hospital, Hallym University, Hwaseong, Korea.
4. Division of Cardiology, Department of Internal Medicine, Korea University Anam Hospital, Seoul, Korea.
5. Division of Cardiology, Department of Internal Medicine, School of Medicine, Keimyung University, Dongsan Hospital, Daegu, Korea.
6. Division of Cardiology, Department of Internal Medicine, Chungbuk National University School of Medicine, Cheongju, Korea.
7. Division of Cardiology, Department of Internal Medicine, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea.
8. Division of Cardiology, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea.
9. Division of Cardiology, Department of Internal Medicine, Gyeongsang National University College of Medicine, Jinju, Korea.
10. Division of Cardiology, Department of Internal Medicine, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
11. Division of Cardiology, Department of Internal Medicine, Kyungpook National University, Daegu, Korea.
12. Division of Cardiology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
13. Division of Cardiology, Department of Internal Medicine, Cardiovascular Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
14. Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
15. Division of Cardiology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
16. Division of Cardiology, Department of Internal Medicine, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea.