1 Department of Obstetrics and Gynecology, Prentice Women's Hospital, Northwestern University Feinberg School of Medicine, 250 E. Superior St., Suite #05-2303, Chicago, IL 60611. Electronic address: [email protected].
2 Department of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, St. Louis, MO.
3 Department of Women's Health, Dell Medical School, The University of Texas at Austin, Austin, TX.