1. Center for Research on Reproduction and Women's Health; Perelman School of Medicine, University of Pennsylvania; Philadelphia Pennsylvania
2. Center of Excellence in Environmental Toxicology; Perelman School of Medicine, University of Pennsylvania; Philadelphia Pennsylvania
3. Division of Neonatology; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
4. Division of Endocrinology and Diabetes; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
5. Department of Pediatrics; Perelman School of Medicine, University of Pennsylvania; Philadelphia Pennsylvania