1. Tohoku University Graduate School of Medicine
2. National Cerebral and Cardiovascular Center
3. Japanese Red Cross Kumamoto Hospital
4. Sakakibara Heart Institute
5. Yamagata Prefectural Central Hospital
6. Niigata Prefectural Shibata Hospital
7. Ehime Prefectural Niihama Hospital
8. Jichi Medical University Saitama Medical Center
9. Kumamoto University Graduate School of Medical Sciences