1. Department of Cardiovascular Medicine; Toyohashi Heart Center; Aichi Japan
2. Department of Cardiology; Saiseikai Yokohama-City Eastern Hospital; Kanagawa Japan
3. Division of Cardiology; Sapporo CardioVascular Clinic; Hokkaido Japan
4. Division of Cardiology; Sakurabashi-Watanabe Hospital; Osaka Japan
5. Division of Cardiology; Saitama Prefecture Cardiovascular and Respiratory Center; Saitama Japan
6. Cardiology Department; Saitama Sekishinkai Hospital; Saitama Japan
7. Department of Cardiology; Takase Clinic; Gunma Japan
8. Department of Cardiovascular; the Cardiovascular Institute; Tokyo Japan
9. Division of Cardiology; Higashi Takarazuka Satoh Hospital; Osaka Japan