1. Division of Cardiology Osaka General Medical Center 3‐1‐56 Mandaihigashi, Sumiyoshi‐ku Osaka 558‐8558 Japan
2. Division of Cardiology Osaka Rosai Hospital Osaka Japan
3. Division of Cardiology Osaka Police Hospital Osaka Japan
4. Division of Cardiovascular Medicine Amagasaki‐Chuo Hospital Amagasaki 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 Cardiology Rinku General Medical Center Osaka Japan
8. Department of Cardiovascular Medicine Osaka University Graduate School of Medicine Suita Japan