1. UCLH Cancer Clinical Trials Unit, University College London Hospitals, London, UK
2. School of Health Sciences, Faculty of Health & Medical Sciences, University of Surrey, Guildford, UK
3. Centre for Nurse, Midwife and Allied Health Profession Led Research (CNMAR), University College London Hospitals NHS Foundation Trust, London, UK
4. Centre for Outcomes and Experience Research in Children’s Health, Illness and Disability (ORCHID), Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK