[1] Kenya Govt Med Res Ctr, Ctr Microbiol Res, Nairobi, Kenya
[2] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA USA
[3] Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, San Francisco, CA 94143 USA
[4] Duke Univ, Duke Global Hlth Inst, Durham, NC USA
[5] Duke Univ, Dept Obstet & Gynecol, Durham, NC USA
[6] Univ N Carolina, Dept Epidemiol, Gillings Sch Global Publ Hlth, Chapel Hill, NC 27515 USA
[7] Univ N Carolina, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27515 USA