1. Department of Metabolic Medicine; Graduate School of Medicine, Osaka University; Suita Japan
2. Department of Internal Medicine (I); Osaka Medical College; Takatsuki Japan
3. Department of Endocrinology and Diabetes; Saitama Medical University; Japan
4. Department of Endocrinology, Metabolism and Diabetes; Kinki University School of Medicine; Osaka Japan
5. Diabetes Center; Tokyo Women's Medical University School of Medicine; Tokyo Japan
6. Department of Laboratory Medicine; Ehime University School of Medicine; Japan
7. Department of Metabolism/Diabetes and Clinical Nutrition; Nagasaki University Hospital; Nagasaki Japan
8. Third Department of Internal Medicine; University of Yamanashi School of Medicine; Yamanashi Japan
9. Department of Internal Medicine; Saiseikai Central Hospital; Tokyo Japan
10. Department of Internal Medicine; The Sakakibara Heart Institute of Okayama; Okayama Japan
11. Department of Diabetes and Metabolism; Iwate Medical University; Morioka Japan
12. Department of Internal Medicine; Kakogawa Municipal Hospital; Kakogawa Japan
13. Diabetes Center; Shiraishi Hospital; Japan Ehime Japan
14. Department of Internal Medicine; Saitama Social Insurance Hospital; Saitama Japan