[1] Univ N Carolina, Dept Epidemiol, Chapel Hill, NC 27515 USA
[2] Univ N Carolina, Dept Pediat, Chapel Hill, NC 27515 USA
[3] Duke Univ, Med Ctr, Div Infect Dis, Durham, NC USA
[4] Duke Univ, Med Ctr, Duke Global Hlth Inst, Durham, NC USA
[5] Kinshasa Sch Publ Hlth, Kinshasa, DEM REP CONGO
[6] Univ Alabama Birmingham, Birmingham, AL USA
[7] Univ Teaching Hosp, Lusaka, Zambia
[8] Indiana Univ, Sch Med, Indianapolis, IN USA
[9] Moi Univ, Sch Med, Dept Child Hlth & Paediat, Eldoret, Kenya
[10] Aga Khan Univ, Dept Community Hlth Sci, Karachi, Pakistan
[11] Columbia Univ, Dept Obstet & Gynecol, New York, NY USA
[12] RTI Int, Social Stat & Environm Sci, Res Triangle Pk, NC USA
[13] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Bethesda, MD USA
[14] Thomas Jefferson Univ, Philadelphia, PA 19107 USA
[15] Christiana Care, Dept Obstet & Gynecol, Newark, DE USA