[1] Univ Calif San Diego, Sch Med, Div Infect Dis & Global Publ Hlth, San Diego, CA 92103 USA
[2] Social & Sci Syst Inc, Silver Spring, MD USA
[3] Univ Liverpool Liverpool Sch Trop Med, Ctr Maternal & Newborn Hlth, Liverpool, Merseyside, England
[4] Univ Alabama Birmingham, Div Infect Dis, Birmingham, AL USA
[5] Univ Calif Los Angeles, Dept Pediat, Los Angeles, CA 90024 USA
[6] Univ Calif Los Angeles, Dept Pediat, Div Infect Dis, Los Angeles, CA 90024 USA
[7] Univ Calif Los Angeles, Dept Obstet Gynecol & Reprod Sci, Div Infect Dis, Los Angeles, CA USA
[8] Univ Calif San Francisco, Dept Obstet Gynecol & Reprod Sci, Div Infect Dis, San Francisco, CA 94143 USA
[9] Boston Univ, Sch Med, Boston Med Ctr, Div Infect Dis, Boston, MA 02118 USA
[10] Univ Pittsburg, Dept Obstet Gynecol & Reprod Sci, Pittsburgh, PA USA