1. Department of Psychology, University of Southampton, Southampton, UK
2. Department of Paediatric Psychology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
3. The Royal Marsden Hospital, Sutton, UK
4. Shooting Star Chase Children’s Hospice, Guildford, UK
5. Department of Anaesthesia and Pain Medicine, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
6. UCL Institute of Child Health, London, UK