1. Department of Neurology, Hematology, Metabolism, Endocrinology and Diabetology (DNHMED); Yamagata University Faculty of Medicine; Yamagata Japan
2. Department of Pharmacology and Toxicology; Dokkyo Medical University School of Medicine; Tochigi Japan
3. Division of Diabetes and Endocrinology, Department of Internal Medicine; Showa University School of Medicine; Tokyo Japan
4. Division of Geriatric Medicine; Nippon Medical School; Tokyo Japan