1. Department of Neuropsychology; Frenchay Hospital; Bristol; UK
2. Faculty of Health and Life Sciences; University of the West of England; Bristol; UK
3. Department of Medicine; University of the Witwatersrand; Johhannesburg; South Africa
4. Department of Paediatric Oncology; Bristol Royal Hospital for Children; Bristol; UK
5. Department of Paediatric Neurology; Frenchay Hospital; Bristol; UK