1. Animal Physiology Research Unit, National Institute of Agrobiological Sciences, Ibaraki 305-8602, Japan
2. Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
3. Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA