1. Division of Cardiology Osaka Rosai Hospital 3‐1179 Nagasonecho, Kita‐ku, Sakai Osaka 591‐8025 Japan
2. Division of Cardiology Osaka General Medical Center Osaka Japan
3. Division of Cardiology Amagasaki Chuo Hospital Amagasaki Japan
4. Cardiovascular Division Osaka Police Hospital Osaka Japan
5. Department of Medical Informatics Osaka University Graduate School of Medicine Suita Japan
6. Division of Cardiology Kawanishi City Hospital Kawanishi Japan
7. Department of Cardiovascular Medicine Osaka University Graduate School of Medicine Suita Japan