1. Departments of Biochemistry (M.S., H.S.), Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
2. Department of Physiology (Y.N., J.Y.), Kurume University School of Medicine, Kurume, Fukuoka 830-0011, Japan
3. Departments of Endocrine and Metabolism (Y.H.), Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan