[1] Moi Univ, Dept Reprod Hlth, Eldoret, Kenya
[2] Brown Univ, Warron Alpert Med Sch, 222 Richmond St,Box G-M117, Providence, RI 02912 USA
[3] Brown Univ, Dept Biostat, Providence, RI USA
[4] Acad Model Providing Access Healthcare Partnershi, Eldoret, Kenya
[5] Brown Univ, Div Infect Dis, Warren Alpert Med Sch, Providence, RI 02912 USA
[6] Miriam Hosp, Div Infect Dis, Providence, RI 02906 USA