1. Department of Obstetrics and Gynecology, Eastern Virginia Medical School, CONRAD, Arlington, Virginia.
2. Department of Biostatistics, FHI 360, Durham, North Carolina.
3. Department of Clinical Sciences, FHI 360, Durham, North Carolina.
4. Department of Obstetrics, Gynecology and Reproductive Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
5. Department of Obstetrics and Gynecology, University of Zimbabwe, Harare, Zimbabwe.
6. Department of Medicine, Case Western Reserve University, Cleveland, Ohio.