1. Division of Cardiology, Internal Medicine III, Hamamatsu University School of Medicine
2. Division of Cardiology, Department of Medicine, Keio University School of Medicine
3. Department of Cardiology, National Defense Medical College
4. Department of Cardiology, Kyorin University School of Medicine
5. Department of Cardiology, St. Lukes International Hospital
6. Department of Cardiology, Saitama Medical University International Medical Center
7. Division of Cardiology, Sakakibara Heart Institute