1. Department of Cardiology Tokai University School of Medicine Isehara Japan
2. Department of Cardiology Sendai Kosei Hospital Sendai Japan
3. Department of Cardiology New Tokyo Hospital Chiba Japan
4. Department of Cardiology Saiseikai Yokohama City Eastern Hospital Yokohama Japan
5. Department of Cardiology Shonan Kamakura General Hospital Kamakura Japan
6. Division of Cardiology Kokura Memorial Hospital Kitakyushu Japan
7. Division of Cardiology Kindai University Osakasayama Japan
8. Department of Cardiovascular Surgery Tokyo Bay Urayasu‐Ichikawa Medical Center Chiba Japan
9. Department of Cardiology Toyama University Hospital Toyama Japan
10. Department of Cardiology Ogaki Municipal Hospital Gifu Japan
11. Department of Cardiology Teikyo University School of Medicine Tokyo Japan
12. Department of Cardiology Toyohashi Heart Center Toyohashi Japan
13. Department of Cardiology Keio University School of Medicine Tokyo Japan