1 Vanderbilt University School of Medicine, Nashville, TN 37232, USA. Electronic address: majaliwa.mzombwe@vanderbilt.edu.
2 Department of Medicine, Catholic University of Health and Allied Sciences, Mwanza, Tanzania.
3 London School of Hygiene and Tropical Medicine, Medical Research Council Tropical Epidemiology Group, London, UK; Mwanza Intervention Trials Unit, National Institute for Medical Research, Mwanza, Tanzania.
4 Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
5 Center for Global Health and Department of Medicine, Division of General Internal Medicine, Weill Cornell Medical College, New York, NY, USA; Department of Medicine, Weill Bugando School of Medicine, Mwanza, Tanzania.