1. Department of Cardiovascular Medicine Hokkaido University Graduate School of Medicine Sapporo Japan
2. Faculty of Health Sciences Yamaguchi Graduate School of Medicine Ube Japan
3. Cardiovascular Medicine Jichi Medical University Saitama Medical Center Saitama Japan
4. Furushima Clinic Niigata Japan
5. Cardiovascular Division Faculty of Medicine University of Tsukuba Tsukuba Japan
6. Asakusa Heart Clinic Tokyo Japan
7. Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
8. Division of Cardiology Department of Medicine and Clinical Sciences Yamaguchi Graduate School of Medicine Ube Japan
9. Division of Cardiology Department of Medicine Tokai University Hachioji Hospital Hachioji Japan
10. Department of Cardiovascular Medicine National Hospital Organization Wakayama Hospital Hidakagun Japan
11. Department of Cardiovascular Surgery Nippon Medical School Tokyo Japan
12. Heart Rhythm Center Tokyo Medical and Dental University Tokyo Japan
13. Cardiovascular Center Saiseikai Kumamoto Hospital Kumamoto Japan