1. Department of Cardiology; Keio University School of Medicine; Tokyo Japan
2. Department of Cardiovascular Medicine; National Cerebral and Cardiovascular Center; Suita Japan
3. National Heart and Lung Institute, Imperial College London; London UK
4. Department of Cardiovascular Medicine; Hokkaido University Graduate School of Medicine
5. Division of Cardiology; Kyorin University School of Medicine; Tokyo Japan
6. Department of Cardiology; St Luke's International Hospital; Tokyo Japan
7. Department of Cardiology; Saitama Medical University International Medical Center; Saitama Japan
8. Department of Cardiology; Sakakibara Heart Institute; Tokyo Japan
9. Department of Cardiology; National Defense Medical College