[1] Univ Pittsburgh, Sch Med, Dept Ob GYN RS, UPMC Magee Womens Hosp, Pittsburgh, PA 15260 USA
[2] Ctr Global Dev, Washington, DC USA
[3] Johns Hopkins Berman Inst Bioeth, Baltimore, MD USA
[4] Emory Univ, Sch Med, Dept Gynecol & Obstet, Atlanta, GA 30322 USA
[5] Univ N Carolina, Dept Social Med, Chapel Hill, NC 27515 USA
[6] Univ N Carolina, Ctr Bioeth, Chapel Hill, NC 27515 USA
[7] Duke Univ, Sch Med, Dept Obstet & Gynecol, Durham, NC 27706 USA
[8] Weill Cornell Sch Med, Dept Obstet & Gynecol, New York, NY USA
[9] Johns Hopkins Bloomberg Sch Publ Hlth, Ctr Immunizat Res, Dept Int Hlth, Baltimore, MD USA