1. Department of Cardiovascular Medicine, Saga University
2. Department of Clinical Epidemiology, Hyogo College of Medicine
3. Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
4. Department of Cardiology, National Hospital Organization Kyoto Medical Center
5. Department of Cardiology, Chikamori Hospital
6. Department of Cardiology, Saiseikai Kumamoto Hospital
7. Department of Cardiology, Kokura Memorial Hospital
8. Division of Cardiology, Mitsui Memorial Hospital
9. Department of Cardiology, Tokai University Hospital
10. Hanaoka Seishu Memorial Cardiovascular Clinic
11. Department of Cardiology, Iwate Medical University Hospital
12. Department of Cardiology, Teikyo University Hospital
13. Department of Cardiology, Kurashiki Central Hospital