1. Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine and Graduate School of MedicineHokkaido University Sapporo Japan
2. Clinical Research and Medical Innovation CentreHokkaido University Hospital Sapporo Japan
3. Third Department of Internal MedicineHokkaido P.W.F.A.C Obihiro‐Kosei General Hospital Obihiro Japan
4. Sapporo Diabetes and Thyroid Clinic Sapporo Japan
5. Division of Diabetes and Endocrinology, Department of Medicine, Sapporo Medical CentreNTT East Corporation Sapporo Japan
6. Department of Internal MedicineJiyugaoka Medical Clinic Obihiro Japan
7. Department of Diabetes CentreManda Memorial Hospital Sapporo Japan
8. Kurihara Clinic Sapporo Japan
9. Aoki Clinic Sapporo Japan
10. Division of Diabetes and Obesity, Faculty of Medicine and Graduate School of MedicineHokkaido University Sapporo Japan