1. School of Medicine University of Liverpool Liverpool UK
2. Department of Women's and Children's Health University of Liverpool Liverpool UK
3. Royal Liverpool and Broadgreen University Hospital Trust Liverpool UK
4. National Institute for Health Research Alder Hey Clinical Research Facility Alder Hey Children's Hospital Liverpool UK
5. Emergency Department Alder Hey Children's Hospital Liverpool UK
6. Darwin Emergency Department Darwin Northern Territory Australia
7. Paediatric Emergency Medicine Sunderland Royal Hospital Sunderland UK
8. Department of Respiratory Medicine Alder Hey Children's Hospital Liverpool UK