[1] Ctr Dis Control & Prevent, Div STD Prevent, Atlanta, GA USA
[2] FHI360, Durham, NC USA
[3] Univ Pittsburgh, Sch Med, Magee Womens Hosp, Div Gynecol Specialties,UPMC, Pittsburgh, PA USA
[4] Univ Pittsburgh, Sch Med, Magee Womens Hosp, Div Reprod Infect Dis & Immunol,UPMC, Pittsburgh, PA USA
[5] Alabama Fertil Specialists, Birmingham, AL USA
[6] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Epidemiol, Pittsburgh, PA USA
[7] Magee Womens Res Inst, Pittsburgh, PA USA
[8] Ctr Dis Control & Prevent, Div Reprod Hlth, Atlanta, GA USA
[9] Univ Alabama Birmingham, Div Infect Dis, Birmingham, AL USA