1. Department of Endocrinology, Metabolism and Infectious diseases; Hirosaki University School of Medicine and Hospital; Hirosaki Japan
2. Institute for Promotion of Medical Science Research; Yamagata University Faculty of Medicine; Yamagata Japan
3. Department of Neurology, Hematology, Metabolism; Endocrinology and Diabetology (DNHMED); Yamagata University Faculty of Medicine; Yamagata Japan