1. Department of cardiovascular surgery, Toyohashi Heart Center, Toyohashi, Japan
2. Department of cardiology, Toyohashi Heart Center, Toyohashi, Japan
3. Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
4. Department of Cardiology, Sendai Kosei Hospital, Sendai, Japan
5. Department of Cardiology, New Tokyo Hospital, Chiba, Japan
6. Department of Cardiology, Saiseikai Yokohama City Eastern Hospital, Yokohama, Japan
7. Department of Cardiology, Shonan Kamakura General Hospital, Kanagawa, Japan
8. Department of Cardiology, Kokura Memorial Hospital, Kokura, Japan
9. Department of Cardiology, Teikyo University School of Medicine, Tokyo, Japan
10. Department of Cardiology, Keio University School of Medicine, Tokyo, Japan