1. School of Health Sciences, University of Nottingham, Nottingham NG7 2HA, UK
2. NIHR Nottingham Biomedical Research Centre, Nottingham NG7 2UH, UK
3. Department of Research and Education in Emergency Medicine, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, UK
4. General Surgery Department, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, UK
5. Health Innovation East Midlands, Nottingham NG7 2TU, UK