[1] Univ Washington, Dept Epidemiol, Seattle, WA 98104 USA
[2] Univ Washington, Dept Global Hlth, Seattle, WA 98195 USA
[3] Univ Nairobi, Inst Trop & Infect Dis, Nairobi, Kenya
[4] Univ Washington, Dept Psychol, Seattle, WA 98195 USA
[5] Coast Prov Gen Hosp, Mombasa, Kenya
[6] Univ Washington, Dept Biostat, Seattle, WA 98195 USA
[7] Univ Washington, Dept Med, Seattle, WA USA