1. Department of Cardiology Keio University School of Medicine Tokyo Japan
2. Department of Healthcare Quality Assessment The University of Tokyo Tokyo Japan
3. Division of Cardiology, Department of Medicine Stanford University Stanford CA USA
4. Department of Cardiovascular Medicine Kyorin University Faculty of Medicine Tokyo Japan
5. Department of Cardiology Saiseikai Central Hospital Tokyo Japan
6. Department of Cardiology National Defense Medical College Tokorozawa Japan
7. Department of Cardiology Saitama Medical University, International Medical Center Saitama Japan
8. Department of Cardiology Sakakibara Heart Institute Tokyo Japan