1. Department of Pathology University of Cambridge Cambridge UK
2. School of Life Sciences University of Essex Colchester UK
3. Department of Women and Children's Health King's College London London UK
4. MRC Unit The Gambia at London School of Hygiene and Tropical Medicine Banjul The Gambia
5. MRC Epidemiology Unit University of Cambridge School of Clinical Medicine Cambridge UK
6. Department of Paediatrics University of Cambridge School of Clinical Medicine Cambridge UK
7. Institute of Metabolic Science Cambridge Biomedical Campus Cambridge Cambridge UK
8. Growth and Development Lab Department of Anthropology University of Colorado Boulder CO USA
9. Institute of Behavioural Science University of Colorado Boulder CO USA