1. Department of Obstetrics and Gynecology, John H. Stroger Jr. Hospital of Cook County, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.
2. Department of Preventive Medicine and Center for Healthcare Studies Northwestern University and Department of Veterans Affairs, Chicago, Illinois.
3. Department of Clinical Pharmacy, University of California San Francisco, San Francisco, California.
4. Department of Obstetrics and Gynecology, Maimonides Medical Center, New York, New York.
5. Cook County Health and Hospitals System/Hektoen Institute of Medicine Chicago, Illinois.
6. Department of Obstetrics and Gynecology, Albert Einstein College of Medicine, Bronx, New York.
7. Department of Obstetrics and Gynecology, Georgetown University, District of Columbia, Washington.
8. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
9. Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri.