1. Cancer Clinical Trials Unit, University College London Hospitals NHS Foundation Trust, London NW1 2PG, UK
2. Centre for Nurse, Midwife and AHP Led Research (CNMAR), University College London Hospitals NHS Foundation Trust, London NW1 2PG, UK
3. Department of Targeted Intervention, University College London, London WC1E 6BT, UK
4. School of Sociology and Social Policy, University of Leeds, Leeds LS2 9JT, UK
5. Leeds Institute of Medical Research, School of Medicine, University of Leeds, Leeds LS2 9JT, UK
6. Academic Unit of Health Economics, Leeds Institute of Health Sciences, University of Leeds, Leeds LS2 9JT, UK
7. Teenage and Young Adult Cancer Service, Leeds Teaching Hospitals NHS Foundation Trust, Leeds LS9 7TF, UK
8. Teenage Cancer Trust, London WC1V 7AA, UK