1. Medical Research Council Unit–The Gambia at the London School of Hygiene and Tropical Medicine, Fajara
2. Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, United Kingdom
3. Sanger Institute, Wellcome Trust, Pathogen Genomics, Cambridge, United Kingdom
4. The Vaccine Centre, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, United Kingdom
5. Centre for International Health, University of Otago, Otago, New Zealand