1. Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115
2. Department of Endocrinology, Hematology, and Gerontology, Graduate School of Medicine, Chiba University, 260-8670 Chiba, Japan
3. Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, 260-8670 Chiba, Japan
4. HHMI, Chevy Chase, MD 20815