1. Faculty of Medicine and Health Sciences, University of East Anglia, Norwich
2. Centre for Geographic Medicine Research (Coast), Kenya Medical Research Institute
3. Physiotherapy Department, Kilifi District Hospital, Kilifi, Kenya, and
4. Neuroscience Unit, Institute of Child Health, University College London, London
5. Department of Psychiatry, University of Oxford, Oxford, UK
6. Faculty of Health, University of Sydney, Sydney, NSW, Australia