1. Faculty of Epidemiology and Population Health; London School of Hygiene & Tropical Medicine; London UK
2. Mwanza Medical Research Centre; National Institute for Medical Research; Mwanza Tanzania
3. Department of Nutrition, Exercise and Sports; University of Copenhagen; Copenhagen Denmark
4. Vanderbilt Institute for Global Health; Vanderbilt University Medical Center; Nashville TN USA
5. Barts & the London School of Medicine; Queen Mary University of London; London UK
6. University of Zambia School of Medicine; Lusaka Zambia
7. University Teaching Hospital; Lusaka Zambia