1. Division of Cardiology, Department of Medicine and Clinical Science, Yamaguchi University Graduate School of Medicine
2. Department of Cardiology, Osaka Saiseikai Nakatsu Hospital
3. Department of Cardiology, National Hospital Organization Kyusyu Medical Center
4. Department of Cardiology, Saiseikai Yokohama City Eastern Hospital
5. Department of Cardiology, Saiseikai Yamaguchi General Hospital
6. Department of Cardiology, Fukuoka Wajiro Hospital
7. Department of Cardiovascular Medicine, Saga-Ken Medical Center Koseikan
8. Department of Cardiology, Oda Hospital
9. Department of Cardiology, Yamaguchi Grand Medical Center
10. Department of Cardiology, Saiseikai Kumamoto General Hospital
11. Division of Cardiology, Department of Medicine, Showa University School of Medicine