1. Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, Atlantic Boulevard, Fajara, Banjul, The Gambia
2. Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
3. Murdoch Children’s Research Institute, Royal Children’s Hospital Flemington Road, Parkville, Victoria 3052, Australia
4. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, UK
5. Department of Paediatrics, University of Melbourne, Melbourne, Australia