1. Epidemiology Branch; Division of Intramural Population Health Research; Eunice Kennedy Shriver National Institute of Child Health and Human Development; Bethesda MD USA
2. Program in Reproductive and Adult Endocrinology; Eunice Kennedy Shriver National Institute of Child Health and Human Development; Bethesda MD USA
3. Division of Library Services; Office of Research Services; National Institutes of Health Library; National Institutes of Health; Bethesda MD USA