1. University of Tsukuba 1‐1‐1 Tennodai, Tsukuba Ibaraki 305‐8577 Japan
2. Kokura Memorial Hospital Fukuoka Japan
3. National Cerebral and Cardiovascular Center Osaka Japan
4. Ichinomiya Municipal Hospital Aichi Japan
5. Cardiovascular Division National Hospital Organization Osaka National Hospital Osaka Japan
6. Japanese Red Cross Saitama Hospital Saitama Japan
7. Toho University Tokyo Japan
8. Hoshi General Hospital Fukushima Japan
9. Nagoya University Aichi Japan
10. Okayama University Okayama Japan
11. Nippon Medical School Tokyo Japan
12. Boston Scientific Diegem Belgium
13. Boston Scientific St. Paul MN USA
14. Institut Jantung Negara Kuala Lumpur Malaysia
15. Department of Medicine, Faculty of Medicine at Ramathibodi Hospital Mahidol University Bangkok Thailand
16. Department of Medicine and Therapeutics, Prince of Wales Hospital Chinese University of Hong Kong Shatin Hong Kong
17. University of Rochester Rochester NY USA
18. Osaka University Osaka Japan