1. Division of Cardiology, Japanese Red Cross Otsu Hospital
2. Department of Cardiology, Tenri Hospital
3. Division of Cardiology, Kobe City Medical Center General Hospital
4. Cardiovascular Center, Sakurabashi Watanabe Hospital
5. Cardiovascular Center, Shiroyama Hospital
6. Department of Cardiology, Ogaki Municipal Hospital
7. Department of Cardiology, Saiseikai Izuo Hospital
8. Heart Rhythm Center, Okayama Heart Clinic
9. Department of Cardiovascular Medicine, Shiga University of Medical Science
10. Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
11. Department of Heart Failure and Transplantation, National Cerebral and Cardiovascular Center
12. Department of Clinical Epidemiology, Hyogo College of Medicine
13. Department of Cardiovascular Medicine, Kyoto University Graduate School of Medicine