1. Department of Internal Medicine and Molecular Science, Graduate School of Medicine, Osaka University, Suita, Japan
2. First Department of Internal Medicine, Osaka Medical College, Takatsuki, Japan
3. Diabetes Center, Tokyo Women’s Medical University School of Medicine, Tokyo, Japan
4. Diabetes Center, Kasori Hospital, Chiba, Japan
5. Unit of Metabolism/Diabetes and Clinical Nutrition, Nagasaki University School of Medicine, Nagasaki, Japan
6. Third Department of Internal Medicine, University of Yamanashi School of Medicine, Nakakoma, Japan
7. Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
8. Ehime Prefectural Central Hospital, Internal Medicine, Matsuyama, Japan
9. Department of Virology, Kurume University School of Medicine, Kurume, Japan
10. Department of Internal Medicine, Saitama Social Insurance Hospital, Urawa, Japan
11. Department of Laboratory Medicine, Ehime University School of Medicine, Ehime, Japan