1. Mwanza Research Centre, National Institute for Medical Research , Mwanza , Tanzania
2. Department of Infectious Diseases, Rigshospitalet , Copenhagen , Denmark
3. Department of Nutrition, Exercise and Sports, University of Copenhagen , Copenhagen , Denmark
4. Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine , London , UK
5. Centre for Physical Activity Research, Copenhagen University Hospital—Rigshospitalet , Copenhagen , Denmark
6. Department of Infectious Diseases, Copenhagen University Hospital , Hvidovre, Copenhagen , Denmark
7. Mwanza Intervention Trials Unit/National Institute for Medical Research , Mwanza , Tanzania
8. Weill Cornell Medical College , New York , USA