1. Medical Research Council Unit The Gambia, London School of Hygiene and Tropical Medicine , Fajara , The Gambia
2. Liverpool School of Tropical Medicine , Liverpool , United Kingdom
3. Ministry of Health and Social Welfare , Banjul , The Gambia
4. Centre for International Health, University of Otago , Dunedin , New Zealand
5. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine , London , United Kingdom
6. Murdoch Children’s Research Institute , Melbourne , Australia