1 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Warren Alpert Medical School of Brown University, Women & Infants Hospital, Providence, RI 02885. Electronic address: brock.polnaszek@gmail.com.
2 Spatial Structures in the Social Sciences and Population Studies and Training Center, Brown University, Providence, RI.
3 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Northwestern Medicine Feinberg School of Medicine, Prentice Memorial Hospital, Chicago, IL.
4 Department of Psychiatry and Behavioral Sciences, Northwestern Medicine Feinberg School of Medicine, Chicago, IL.
5 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Warren Alpert Medical School of Brown University, Women & Infants Hospital, Providence, RI.