1 Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Warren Alpert Medical School of Brown University, Providence, RI; Center for Digital Health, Brown School of Public Health, Providence, RI. Electronic address: [email protected].
2 Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Warren Alpert Medical School of Brown University, Providence, RI.