1. Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD;
2. Program in Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD;
3. Division of Hematology, Associated Regional and University Pathologists and Veteran's Administration Hospital, and Eccles Institute of Human Genetics, University of Utah School of Medicine, Salt Lake City, UT; and
4. Division of Endocrinology, Tufts Medical Center, Boston, MA