1. Department of Pharmacology and Toxicology; Dokkyo Medical University School of Medicine; Tochigi Japan
2. Department of Internal Medicine; Oarai Coast Core Clinic; Ibaraki Japan
3. Division of Geriatric Medicine; Nippon Medical School; Tokyo Japan
4. Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology (DNHMED); Yamagata University Faculty of Medicine; Yamagata Japan
5. Division of Diabetes, Metabolism, and Endocrinology; Department of Medicine; Showa University School of Medicine; Tokyo Japan
6. Division of Nephrology; Department of Internal Medicine; Graduate School of Medicine, Nippon Medical School; Tokyo Japan
7. Department of Comprehensive Medical Care and Health Science; Graduate School of Medicine, Nippon Medical School; Tokyo Japan