1. Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
2. Department of Clinical Epidemiology, Hyogo College of Medicine
3. Division of Cardiology, Kobe City Medical Center General Hospital
4. Division of Cardiology, Tenri Hospital
5. Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University
6. Department of Cardiovascular Surgery, Iwate Medical University
7. Division of Cardiovascular Surgery, Kokura Memorial Hospital
8. Division of Cardiovascular Surgery, Shizuoka City Shizuoka Hospital
9. Division of Cardiovascular Surgery, Nara Hospital, Kinki University Faculty of Medicine
10. Division of Cardiovascular Surgery, Kurashiki Central Hospital