1. Second Department of Internal Medicine, University of Toyama
2. Department of Cardiology, Teikyo University School of Medicine
3. Department of Cardiology, Saiseikai Utsunomiya Hospital
4. Department of Cardiology, Keio University School of Medicine
5. Department of Cardiology, Sendai Kosei Hospital
6. Department of Cardiology, New Tokyo Hospital
7. Department of Cardiology, Saiseikai Yokohama City Eastern Hospital
8. Department of Cardiology, Shonan Kamakura General Hospital
9. Department of Cardiology, Kokura Memorial Hospital
10. Department of Cardiology, Osaka City General Hospital
11. Department of Cardiovascular Surgery, Tokyo Bay Urayasu-Ichikawa Medical Center
12. Department of Cardiology, Ogaki Municipal Hospital
13. Department of Cardiology, Toyohashi Heart Center