1. Department of Epidemiology and Demography, KEMRI—Wellcome Trust Research Programme , Kilifi , Kenya
2. Department of Medicine and Department of Pediatrics, Center for Global Health, Weill Cornell Medicine , New York, New York , USA
3. Mwanza Interventional Trials Unit , Mwanza , Tanzania
4. Department of Medicine and Department of Pediatrics, Weill Bugando School of Medicine , Mwanza , Tanzania