1. Department of Rheumatology, Endocrinology and Nephrology Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
2. Clinical Research and Medical Innovation Center Hokkaido University Hospital Sapporo Japan
3. Division of Diabetes and Endocrinology Department of Medicine NTT Sapporo Medical Center Sapporo Japan
4. Third Department of Internal Medicine Hokkaido P.W.F.A.C Obihiro‐Kosei General Hospital Obihiro Japan
5. Department of Diabetes Centre Manda Memorial Hospital Sapporo Japan
6. Department of Internal Medicine Jiyugaoka Medical Clinic Obihiro Japan
7. Sapporo Diabetes and Thyroid Clinic Sapporo Japan
8. Aoki Clinic Sapporo Japan
9. Kurihara Clinic Sapporo Japan
10. Division of Diabetes and Obesity Faculty of Medicine and Graduate School of Medicine Hokkaido University Graduate School of Medicine Sapporo Japan