1. Division of Cardiology Osaka General Medical Center Osaka Japan
2. Division of Cardiovascular Medicine Osaka University Graduate School of Medicine Osaka Japan
3. Department of Cardiology Amagasaki Chuo Hospital Amagasaki Japan
4. Division of Cardiology Osaka Police Hospital Osaka Japan
5. Division of Cardiology Kawanishi City Hospital Kawanishi Japan
6. Cardiovascular Division National Hospital Organization Osaka National Hospital Osaka Japan
7. Cardiovascular Division Kobe Ekisaikai Hospital Kobe Japan
8. Division of Cardiology Kansai Rosai Hospital Amagasaki Japan