1. Department of Medicine; Tokyo Women's Medical University; Medical Center East; Tokyo Japan
2. Department of Diabetes, Endocrine and Metabolic Diseases; Tokyo Women's Medical University Yachiyo Medical Center; Chiba Japan
3. Internal Medicine; Suzuki Clinic; Tokyo Japan
4. Internal Medicine; Oyama East Clinic; Tochigi Japan
5. Internal Medicine; Nishiyamado-Keiwa Hospital; Ibaraki Japan
6. Department of Medicine; Diabetes Center; Institute of Geriatrics; Tokyo Women's Medical University; Tokyo Japan
7. Josai Hospital; Tokyo Japan
8. Diabetes and lifestyle Center; Tomonaga Clinic; Tokyo Japan
9. Diabetes Center; Edogawa Hospital; Medical Plaza Shinozaki; Tokyo Japan
10. Nishikawa Clinic; Tokyo Japan
11. Tokyo Women's Medical University/The Institute for Adult Diseases; Asahi Life Foundation; Tokyo Japan