1. Cardiovascular Center, Hanyang University Guri Hospital
2. Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital
3. Cardiovascular Center, Hallym University Sacred Heart Hospital
4. Department of Internal Medicine, Department of Internal Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine
5. Division of Cardiology, Department of Internal Medicine, Ewha Womans University School of Medicine
6. Division of Cardiology, Cardiovascular and Stroke Imaging Center, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine
7. Cardiovascular Center, Uijeongbu St. Mary’s Hospital
8. Department of Internal Medicine, Seoul National University College of Medicine, Bundang Hospital
9. Department of Cardiovascular Medicine, Dongtan Sacred Heart Hospital, College of Medicine, Hallym University