1. Wellcome Trust/Kenya Medical Research Institute, Centre for Geographic Medicine Research—Coast, Kilifi, Kenya
2. Nuffield Department of Clinical Medicine
3. Health Protection Agency Haemophilus Reference Unit, WHO Collaborating Centre for Haemophilus influenzae, John Radcliffe Hospital, Headington, Oxford
4. Department of Academic Paediatrics, Imperial College, London, United Kingdom
5. Department of Paediatrics, Oxford University, John Radcliffe Hospital