1. Developmental Endocrinology Branch (V.A., J.L.M., M.W., R.I.G., K.M.B., J.B.), National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892
2. Department of Woman and Child Health (O.N.), Pediatric Endocrinology Unit Q2:08, Astrid Lindgren Children’s Hospital, Karolinska Institute and Hospital, SE-171 76 Stockholm, Sweden
3. Veterinary Resources Program (J.D.B.), Office of Research Services, National Institutes of Health, Bethesda, Maryland 20892