1. Department of Rheumatology, Endocrinology and Nephrology; Faculty of Medicine and Graduate School of Medicine; Hokkaido University; Sapporo Japan
2. Kuriyama Red Cross Hospital; Kuriyama Japan
3. Oki Medical Clinic; Tomakomai Japan
4. Clinical Research and Medical Innovation Center; Hokkaido University Hospital; Sapporo Japan
5. Manda Memorial Hospital; Sapporo Japan
6. Kurihara Clinic; Sapporo Japan
7. Aoki Clinic; Sapporo Japan
8. Division of Diabetes and Obesity; Faculty of Medicine and Graduate School of Medicine; Hokkaido University; Sapporo Japan