1. National Institutes of Health, Bethesda, Maryland; 2nd Department of Internal Medicine, Chiba University, Chuou-Ku, Chiba, Japan
2. Department of Molecular Pharmacology, Stanford University School of Medicine, Palo Alto, California
3. 2nd Department of Internal Medicine, Chiba University, Chuou-Ku, Chiba, Japan
4. National Institutes of Health, Bethesda, Maryland; Section of Endocrinology, Washington Hospital Center and Medstar Research Institute, Washington, D.C.
5. National Institutes of Health, Bethesda, Maryland
6. Section of Endocrinology, Washington Hospital Center and Medstar Research Institute, Washington, D.C.
7. Section of Endocrinology, Washington Hospital Center and Medstar Research Institute, Washington, D.C.; Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland