[1] Univ Calif San Francisco, Sch Nursing, Dept Community Hlth Syst, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Global Programs, San Francisco, CA 94143 USA
[3] Univ Calif San Francisco, Dept Med, Div HIV Infect Dis & Global Med, San Francisco, CA 94143 USA
[4] Kenya Govt Med Res Ctr, Ctr Microbiol Res, Nairobi, Kenya
[5] Univ Calif San Francisco, Sch Nursing, 2 Koret Way, San Francisco, CA 94143 USA