[1] Univ Washington, Dept Urol, Sch Med, Seattle, WA 98195 USA
[2] Univ Illinois, Div Epidemiol & Biostat, Chicago, IL USA
[3] Lumumba Hlth Ctr, UNIM Project, Kisumu, Kenya
[4] Univ Nairobi, Dept Med Microbiol, Nairobi, Kenya
[5] RTI Int, Res Triangle Pk, NC USA
[6] Univ Manitoba, Dept Med Microbiol, Winnipeg, MB, Canada
[7] Univ Manitoba, Dept Community Hlth Sci, Winnipeg, MB R3T 2N2, Canada
[8] Univ Manitoba, Dept Med, Winnipeg, MB R3T 2N2, Canada