1. Stritch School of Medicine, Loyola University Chicago, Chicago, IL 60153, USA
2. Division of Neonatology, Children’s Hospital of Pennsylvania, Philadelphia, PA 19104, USA
3. Department of Obstetrics & Gynecology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
4. Department of Environmental Health Sciences, Columbia University Mailman School of Public Health Environmental Health Sciences, New York, NY 10032, USA
5. Department of Obstetrics, Gynecology & Reproductive Biology, Harvard Medical School, Boston, MA 02115, USA
6. Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, MA 02115, USA
7. Division of Neonatology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
8. Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA