1. Division of Cardiology, Department of Medicine, Showa University School of Medicine
2. Department of Legal Medicine, Showa University School of Medicine
3. Department of Cardiology, Showa University Fujigaoka Hospital
4. Department of Medicine, Hitachi Medical Center Hospital
5. Department of Cardiology, Kanto Rosai Hospital
6. Division of Cardiology and Cardiac Catheterization Laboratories, Showa University Northern Yokohama Hospital
7. Cardiovascular Centre, Showa University Koto-Toyosu Hospital
8. Department of Cardiology, Koyama Memorial Hospital