1. Department of Cardiology, Keio University School of Medicine
2. Department of Health Policy and Management, Keio University School of Medicine
3. Department of Cardiology, Japanese Red Cross Ashikaga Hospital
4. Department of Cardiology, Saiseikai Utsunomiya Hospital
5. Department of Cardiology, National Hospital Organization, Saitama National Hospital
6. Department of Cardiology, National Hospital Organization, Tokyo Medical Center