1. Clinical Endocrinology Branch (F.S.C., G.C., A.C.), National Institutes of Health, Bethesda, Maryland 20892
2. National Institute of Diabetes and Digestive and Kidney Diseases, and Skeletal Clinical Studies Unit (M.K., B.A.B., N.C., M.T.C.), National Institutes of Health, Bethesda, Maryland 20892
3. Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, Radiology Department (T.S.), National Institutes of Health, Bethesda, Maryland 20892
4. Mark O. Hatfield Clinical Center, National Human Genome Research Institute (P.P.F.), National Institutes of Health, Bethesda, Maryland 20892