1. Division of Cardiology, Nihon University Itabashi Hospital
2. Suita Tokushukai Hospital
3. Nakamura Medical Clinic
4. Kuwana City Medical Center
5. Sakakibara Heart Institute
6. Division of Cardiovascular, Respiratory and General Surgery, Nihon University School of Medicine
7. The Cardiovascular Institute
8. Toho University
9. Yokohama Minami Kyosai Hospital
10. International University of Health and Welfare
11. Osaka Police Hospital