1. Section on Growth and Development (F.K., A.A.N., G.R., J.B., J.C.L.) National Institutes of Health, Bethesda, Maryland 20892
2. Center for Molecular Medicine and Pediatric Endocrinology Unit (A.C.A., O.N.), Department of Women's and Children's Health, Karolinska Institutet and Karolinska University Hospital, SE-171 76 Stockholm, Sweden
3. Section on Neuroendocrinology (S.J.C.), Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892