1. Department of Neurosurgery (E.N.K., E.H.O.), University of Virginia, Charlottesville, Virginia 22908-0212
2. Section on Endocrinology and Genetics (M.K., M.L., C.S.), Program in Developmental Endocrinology and Genetics, and Pediatric Endocrinology Program, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892