1. Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, United Kingdom
2. Medical Research Council Unit, Fajara, The Gambia
3. Centre de Développement des Vaccins, Bamako, Mali
4. Department of Zoology, University of Oxford, Oxford, United Kingdom
5. Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
6. Department of Paediatrics, Imperial College, London, United Kingdom
7. Institute of Tropical Medicine, Antwerp, Belgium
8. Vaccine Evaluation Unit, Public Health England, Manchester, United Kingdom
9. Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom