1. School of Public Health, University of Sydney, Sydney, Australia
2. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK
3. MRC/UVRI & LSHTM Uganda Research Unit, Entebbe, Uganda
4. Africa Health Research Institute, Durban, South Africa
5. School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
6. UCL Institute for Global Health, University College London, London, UK