1. Division of Cardiology, Department of Internal Medicine, Konkuk University Medical Center, School of Medicine, Konkuk University
2. Department of Preventive Medicine, College of Medicine, Chungbuk National University
3. Division of Cardiology, Department of Internal Medicine, Yeungnam University Hospital
4. Cardiovascular Division, Department of Internal Medicine, Kyung Hee University Hospital
5. Division of Cardiology, Department of Internal Medicine, Wonju Severance Christian Hospital
6. Cardiovascular Center, Korea University Guro Hospital
7. Department of Internal Medicine, Andong Hospital
8. CHA Bundang Medical Center, CHA University
9. Dong Kang Medical Center
10. Division of Cardiology, Chonbuk National University Hospital
11. Department of Cardiology, Inha University Hospital
12. Department of Internal Medicine, Chungbuk National University, College of Medicine