1. Diabetes Center Ohta Nishinouchi Hospital Koriyama Japan
2. Department of Endocrinology and Metabolism Hirosaki University Graduate School of Medicine Hirosaki Japan
3. Department of Diabetes and Endocrine Medicine Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
4. Department of Internal Medicine Ohta Nishinouchi Hospital Koriyama Japan
5. Department of Pathology and Molecular Medicine Hirosaki University Graduate School of Medicine Hirosaki Japan