1 Frimley Park Hospital NHS Foundation Trust, Frimley, UK [email protected].
2 Galderma UK Ltd, Watford, Hertfordshire, UK.
3 Frimley Health NHS Foundation Trust, Frimley, Surrey, UK.
4 Health Sciences, University of Leicester, Leicester, UK.
5 Paediatric Emergency Medicine Leicester Academic (PEMLA) Group, University Hospitals of Leicester NHS Trust, Leicester, UK.
6 University of Liverpool Faculty of Health and Life Sciences, Liverpool, UK.
7 Alder Hey Children's NHS Foundation Trust, Liverpool, Merseyside, UK.
8 Oxford Trauma and Emergency Care, Kadoorie Research Centre, Nuffield Department of Orthopaedic, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
9 Emergency Department, Bristol Royal Hospital for Children, Bristol, UK.
10 Academic Department of Emergency Care, University of the West of England, Bristol, Avon, UK.