[1] Boston Childrens Hosp, Boston, MA USA
[2] Childrens Hosp Philadelphia, Div Infect Dis, Philadelphia, PA 19104 USA
[3] Right Care Zambia, Lusaka, Zambia
[4] Lusaka Apex Med Univ, Dept Pathol & Microbiol, Lusaka, Zambia
[5] Univ Teaching Hosp, Dept Pathol & Microbiol, Lusaka, Zambia
[6] Boston Univ, Sch Med, Dept Med, Sect Infect Dis, Boston, MA 02118 USA
[7] Univ Penn, Sch Med, Dept Biostat & Epidemiol, Philadelphia, PA 19104 USA
[8] Boston Univ, Sch Publ Hlth, Dept Global Hlth, Boston, MA USA