Affiliation
1The Ohio State University College of Medicine, Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine (Columbus, OH)
2Northwestern University Feinberg School of Medicine, Department of Preventive Medicine (Chicago, IL)
3Northwestern University Feinberg School of Medicine, Department of Medicine (Chicago, IL)
4Tufts University, Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine (Boston, MA)