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