1. Emergency Department, Cambridge University Hospitals NHS Foundation Trust, Cambridge
2. Department of Paediatric Emergency Medicine, Blizard Institute, Queen Mary University London, London
3. Department of Research, Audit, Innovation, & Development (RAID), East Anglian Air Ambulance, Norwich
4. Department of Paediatric Intensive Care, Cambridge University Hospitals NHS Foundation Trust
5. Department of Paediatrics, University of Cambridge, Cambridge
6. Academic Department of Military Emergency Medicine, Royal Centre for Defence Medicine (Research & Clinical Innovation), Birmingham, UK