1. Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom
2. Biomedical Research and Training Institute, Harare, Zimbabwe
3. MRC International Statistics and Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
4. Department of Paediatrics, University of Zimbabwe, Harare, Zimbabwe
5. Division of Clinical Microbiology, University of Cape Town, Cape Town, South Africa
6. School of Biomedical Sciences, University of Western Australia, Perth, Australia
7. Faculty of Health Sciences, UiT, The Arctic University of Norway, Tromsø, Norway
8. Department of Paediatrics, University Hospital of North Norway, Tromsø, Norway
9. Department of Microbiology and Infection Control, University Hospital of North Norway, Tromsø, Norway
10. Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi
11. Department of Paediatrics and Child Health, University of Malawi College of Medicine, Blantyre, Malawi
12. Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
13. School of Health Systems and Public Health, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa