1. Division of Cardiology, Department of Internal Medicine, Pusan National University Yangsan Hospital, Pusan National University of Medicine
2. Heart Institute, Asan Medical Center, Division of Cardiology, Department of Internal Medicine, University of Ulsan College of Medicine
3. Research and Statistical Support, Research Institute of Convergence for Biomedical Science and Technology, Pusan National University Yangsan Hospital
4. Division of Cardiology, Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine
5. Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine