1. Diabetes Center, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
2. Division of Preventive Medicine, Clinical Research Institute for Endocrine and Metabolic Disease, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
3. Department of Diabetes and Endocrinology, Sapporo City General Hospital, Sapporo, Japan.
4. Kenichi Yamada Internal Medicine Clinic, Miyagi, Japan.
5. Misakinaika Clinic, Chiba, Japan.
6. Chofu Tozan Hospital, Tokyo, Japan.
7. Division of Diabetes and Endocrinology, Japanese Red Cross Medical Center, Tokyo, Japan.
8. Department of Internal Medicine, Asama General Hospital, Nagano, Japan.
9. Tokyo Adventist Hospital, Tokyo, Japan.
10. Department of Internal Medicine, National Hospital Organization Matsumoto Medical Center, Nagano, Japan.
11. Shizuoka City Shizuoka Hospital, Shizuoka, Japan.
12. Department of Endocrinology, Tenri Hospital, Nara, Japan.
13. Department of Internal Medicine, Seikeikai Hospital, Osaka, Japan.
14. Oishi Clinic, Kyoto, Japan.
15. Department of Diabetology, The Heart Institute of Okayama, Okayama, Japan.
16. Department of Internal Medicine, Saiseikai Matsuyama Hospital, Ehime, Japan.
17. Kariyushikai Heartlife Clinic, Okinawa, Japan.