1. Department of Medical Biochemistry, Graduate School of Medicine, Ehime University, Tohon-shi, Ehime 791-0295, Japan
2. Division of Endocrinology and Metabolism, Department of Homeostatic Regulation, National Institute for Physiological Sciences, 38 Myodaiji, Okazaki, Aichi 444-8585, Japan
3. Department of Physiological Sciences, School of Life Science, Sokendai (The Graduate University for Advanced Studies), 38 Myodaiji, Okazaki, Aichi 444-8585, Japan