[1] Harvard Univ, Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115 USA
[2] Harvard Univ, Massachusetts Gen Hosp, AIDS Res Ctr, Charlestown, MA USA
[3] Case Western Reserve Univ, Sch Med, Dept Med, Dept Epidemiol & Biostat, Cleveland, OH 44106 USA
[4] Case Western Reserve Univ, Sch Med, Dept Med, Div Infect Dis, Cleveland, OH 44106 USA
[5] Makerere Univ, Sch Med, Dept Med, Kampala, Uganda
[6] Harvard Univ, Massachusetts Gen Hosp, Clin Microbiol Lab, Boston, MA 02115 USA