1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
2. Division of Integrative Physiology, Department of Physiology, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
3. Division of Brain and Neurophysiology, Department of Physiology, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
4. Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan