[1] Duke Univ, Duke Global Hlth Inst, Ctr Hlth Policy & Inequal Res, Durham, NC USA
[2] Univ Washington, Dept Psychol, Seattle, WA 98195 USA
[3] Univ North Carolina Chapel Hill, Dept Social Med, Chapel Hill, NC 27514 USA
[4] Duke Univ, Ctr Child & Family Hlth, Durham, NC USA
[5] Duke Univ, Med Ctr, Dept Pediat, Div Pediat Infect Dis, Durham, NC USA
[6] Kilimanjaro Christian Med Ctr, Moshi, Tanzania