1. Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan
2. Department of Medicine 2, Tokyo Women’s Medical University, Tokyo 162-8666, Japan
3. Division of Endocrinology and Metabolism, Fujita Health University, Aichi 470-1192, Japan
4. Department of Endocrinology, Metabolism and Nephrology, Keio University, Tokyo 160-8582, Japan
5. Department of Endocrinology, Tenri Hospital, Nara 632-8552, Japan
6. Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Toho University School of Medicine, Tokyo 143-8541, Japan
7. Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
8. Department of Internal Medicine II, Kansai Medical University, Osaka 573-1010, Japan
9. The First Department of Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
10. Department of Biostatistics, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan