1. Department of Paediatric Surgery, Evelina London Children’s Hospital, London, UK
2. King’s College, London, UK
3. Central and North West London NHS Foundation Trust, London, UK
4. Marie Curie Palliative Care Research Department, University College London, London, UK
5. Medical Education, Keele University Medical School, Keele, UK
6. Primary Care Patient Safety (PISA) Research Group, Division of Population Medicine, School of Medicine, Cardiff University, Cardiff, UK
7. Department of Family Practice, University of British Columbia, Vancouver, BC, Canada
8. Australian Institute of Health Innovation, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia
9. Department of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK