1. Cardiovascular Center Kansai Rosai Hospital Amagasaki Japan
2. Cardiovascular Division National Hospital Organization Osaka National Hospital Osaka Japan
3. Cardiovascular Center Sakurabashi Watanabe Hospital Osaka Japan
4. Division of Cardiology Osaka General Medical Center Osaka Japan
5. Cardiovascular Division Osaka Police Hospital Osaka Japan
6. Division of Cardiology Osaka Rosai Hospital Sakai Japan
7. Department of Cardiovascular Medicine Osaka University Graduate School of Medicine Osaka Japan
8. Department of Cardiology Osaka Hospital, Japan Community Healthcare Organization Osaka Japan