[1] Univ Washington, Dept Global Hlth, 325 Ninth Ave,NJB Thirteenth Floor,POB 359909, Seattle, WA 98104 USA
[2] Univ Washington, Dept Epidemiol, Seattle, WA 98195 USA
[3] Int Agcy Res Canc WHO IARC, Prevent & Implementat Grp, Lyon, France
[4] Univ Washington, Dept Med, Seattle, WA USA
[5] Univ Washington, Dept Pediat, Seattle, WA 98195 USA
[6] Univ Washington, Dept Biostat, Seattle, WA 98195 USA
[7] Fred Hutchinson Canc Res Ctr, Vaccine & Infect Dis Div, 1124 Columbia St, Seattle, WA 98104 USA
[8] Coptic Hosp, Nairobi, Kenya
[9] Kenya Govt Med Res Ctr, Nairobi, Kenya