1. University of the West of England, Glenside Campus, Bristol
2. South Western Ambulance Service NHS Foundation Trust, Exeter, England
3. Department of Surgery and Cancer, Imperial College Healthcare NHS Trust, London, England
4. Clinical Trials and Evaluation Unit, Bristol Trials Centre, Bristol Medical School, University of Bristol, Bristol, England
5. Bristol Medical School, University of Bristol, Bristol, England
6. Department of Anaesthesia, Royal United Hospital, Bath, England
7. CLAHRC West, Whitefriars, Bristol, England
8. Health Economics Research Centre, Nuffield Department of Population Health, University of Oxford, Oxford, England
9. Intensive Care Unit, University Hospitals Bristol NHS Foundation Trust, Bristol, England