1. Department of General Medicine Yokohama City University School of Medicine Yokohama Japan
2. Department of Community‐oriented Medical Education Chiba University Graduate School of Medicine Chiba Japan
3. Department of General Medicine Chiba University Hospital Chiba Japan
4. Department of Primary Care & Emergency Medicine Kyoto University Hospital Kyoto Japan
5. Department of Medicine, John A. Burns School of Medicine University of Hawai'i Honolulu Hawaii USA
6. The Jikei University School of Medicine Minato‐ku Japan
7. Department of General Medicine Taito Hospital Taito‐ku Japan
8. Department of Community, Family, and General Medicine Kumamoto University Hospital Kumamoto Japan
9. Department of Psychosomatic Internal Medicine Health Sciences University of Hokkaido Ishikari‐gun Japan
10. Yamamoto Clinic Yokohama‐City Japan
11. Department of Cardiovascular Surgery Jichi Medical University Saitama Medical Center Saitama Japan
12. Department of General Medicine Shimane University Hospital Izumo Japan