1. Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
2. Department of Cardiology Hyogo Prefectural Harima‐Himeji General Medical Center Himeji Hyogo Japan
3. Department of Cardiology Kakogawa Central City Hospital Kakogawa Japan
4. Department of Cardiovascular Medicine Yodogawa Christian Hospital Osaka Japan
5. Division of Cardiology Osaka Saiseikai Nakatsu Hospital Osaka Japan
6. Department of Cardiology Hyogo Prefectural Awaji Medical Center Sumoto Japan
7. Division of Cardiology Kobe Red Cross Hospital Kobe Japan
8. Division of Cardiology Aijinkai Takatsuki Hospital Takatsuki Japan