[1] Univ Washington, Dept Med, Seattle, WA USA
[2] Ctr Dis Control, Nairobi, Kenya
[3] Univ Washington, Dept Biostat, Seattle, WA 98195 USA
[4] Univ Washington, Dept Epidemiol, Seattle, WA 98195 USA
[5] Fred Hutchinson Canc Res Ctr, Div Publ Hlth Sci, Seattle, WA 98104 USA
[6] Univ Washington, Ctr AIDS Res, Seattle, WA 98195 USA
[7] Copt Hosp, Copt Hope Ctr Infect Dis, Nairobi, Kenya