1. The Department of Internal MedicineAki General Hospital Aki Japan
2. The Department of CardiologyAki General Hospital Aki Japan
3. The Department of Cardiology and Aging ScienceKochi Medical School Nankoku Japan
4. The Department of MedicineChikamori Hospital Kochi‐Shi Japan
5. The Division of Cardiology, Cardiomyopathy InstituteChikamori Hospital Kochi‐Shi Japan