1. Department of Cardiology, Fujita Health University School of Medicine, Aichi (E.W.).
2. Department of Cardiovascular Surgery, Shizuoka City Shizuoka Hospital (F.Y.)
3. Department of Cardiology, Nagoya City University Hospital (T.G.), Aichi, Japan.
4. Department of Cardiology, Ichinomiya Municipal Hospital (T. Asai), Aichi, Japan.
5. Department of Cardiology, Handa City Hospital (T. Yamamoto), Aichi, Japan.
6. Department of Cardiology, National Hospital Organization Osaka National Hospital (K.H.), Tokyo, Japan.
7. Department of Cardiology, Kyorin University Hospital (T.S.), Tokyo, Japan.
8. Department of Cardiology, Japanese Red Cross Ise Hospital, Mie (A.K.).
9. Department of Cardiology, Chiba University Hospital (M.U.), Tokyo, Japan.
10. Department of Cardiology, Teikyo University Hospital (T. Yamakawa), Tokyo, Japan.
11. Department of Cardiology, Osaka Police Hospital, Japan (Y.U.).
12. Department of Cardiology, Kochi Health Sciences Center, Japan (K.Y.).
13. Department of Cardiology, JA Toride Medical Ctr, Ibaraki, Japan (T.T.).
14. Department of Cardiology, Hiraka General Hospital, Akita, Japan (Y.S.).
15. Department of Cardiology, Kasukabe Chuo General Hospital, Saitama, Japan (K.T.).
16. Department of Cardiology, Fukuyama Cardiovascular Hospital, Hiroshima, Japan (S.H.).
17. Department of Cardiology, Daido Hospital, Aichi, Japan (T. Arakawa).
18. Biotronik, Berlin, Germany (J.S.).
19. Cleveland Clinic, Heart & Vascular Institute, OH (N.V.).
20. Department of Cardiology, Kokura Memorial Hospital, Fukuoka, Japan (K.A.).