1. Department of Obstetrics and Gynecology, NorthShore University HealthSystem, University of Chicago, Pritzker School of Medicine, Evanston, Illinois
2. Department of Neurology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
3. Department of Obstetrics and Gynecology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
4. Department of Obstetrics and Gynecology, University of Pittsburgh, Magee Womens Hospital, Chicago, Illinois