[1] Muheza Dist Hosp, InterACT Study Team, Muheza, Tanzania
[2] Univ Copenhagen, Dept Int Hlth Immunol & Microbiol, Ctr Med Parasitol, Copenhagen, Denmark
[3] Rigshosp, Copenhagen Univ Hosp, Dept Infect Dis, DK-2100 Copenhagen, Denmark
[4] Tanga Ctr, Natl Inst Med Res, Tanga, Tanzania
[5] London Sch Hyg & Trop Med, Dept Infect Dis Epidemiol, London WC1, England
[6] Univ Cape Town, Dept Med, Div Clin Pharmacol, ZA-7925 Cape Town, South Africa