1. Department of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK,
2. Departments of International Health and Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
3. Department of infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
4. Department of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
5. Desmond Tutu TB Centre, Stellenbosch University, Cape Town, South Africa
6. Department of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK