1. Division of Nephrology, Hypertension, and Endocrinology, Department of Internal Medicine, Nihon University School of Medicine, Tokyo 173-8610, Japan
2. Division of Endocrinology, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
3. Division of Metabolism and Endocrinology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki 216-8511, Japan
4. Division of Metabolism and Endocrinology, Department of Internal Medicine, St Marianna University School of Medicine Yokohama City Seibu Hospital, Yokohama 241-0811, Japan
5. Department of Medical Education, National Defense Medical College, Tokorozawa 359-8513, Japan
6. Department of Endocrinology and Metabolism, Saiseikai Yokohamashi Tobu Hospital, Yokohama 230-8765, Japan
7. Department of Endocrinology and Metabolism, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
8. Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
9. Department of Diabetes and Endocrinology, Sapporo City General Hospital, Sapporo 060-8604, Japan
10. Department of Internal Medicine, Graduate School of Medical Science, Kanazawa University, Kanazawa 920-0934, Japan
11. Division of Metabolism, Showa General Hospital, Kodaira 187-0002, Japan
12. Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
13. Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
14. Department of Diabetes, Endocrinology and Nutrition, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
15. Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita 565-0871, Japan