1. Author Affiliations: Dietetics Department, Great Ormond Street Hospital for Children, London, UK (James Evans and Graeme O’Connor)
2. University College London Great Ormond Street Institute of Child Health, London, UK (James Evans and Julie Lanigan)
3. College of Health and Life Science, Aston University, Birmingham, UK (Dan Green)
4. School of Health Sciences, University of Surrey, Guildford, UK (Faith Gibson)
5. Centre for Outcomes and Experience Research in Children’s Health, Illness and Disability (ORCHID), Great Ormond Street Hospital for Children, London, UK (Faith Gibson).