1. Division of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine
2. Division of Cardiology, Asan Medical Center, University of Ulsan College of Medicine
3. Department of Applied Statistics, Gachon University
4. Division of Cardiology, Pusan National University Yangsan Hospital, Pusan National University of Medicine
5. Division of Cardiology, Konkuk University Medical Center, Konkuk University School of Medicine