1. Department of Obstetrics, Gynecology and Reproductive Science, Division of Maternal-Fetal Medicine, University of Maryland School of Medicine, Baltimore, Maryland
2. Department of Obstetrics, Gynecology and Reproductive Science, University of Maryland Medical Center, Baltimore, Maryland
3. Department of Gynecology and Obstetrics, Johns Hopkins University, Baltimore, Maryland
4. Department of Obstetrics, Gynecology and Reproductive Science, University of Maryland School of Medicine, Baltimore, Maryland
5. Department of Pharmacy Practice and Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland
6. Department of Obstetrics, Gynecology and Reproductive Science, University of Pittsburg School of Medicine, Pittsburg, Pennsylvania
7. Department of Anesthesiology, Division of Obstetric Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland