1. NIHR Research Design Service; South West UK
2. Department of Anaesthesia; Critical Care and Pain Medicine; Derriford Hospital; Plymouth UK
3. Department of Medical Statistics; Plymouth University Peninsula Schools of Medicine and Dentistry; Plymouth UK
4. Emergency Department; Critical Care and Pain Medicine; Derriford Hospital; Plymouth UK
5. Faculty of Health and Applied Sciences; University of the West of England; Bristol UK
6. Peninsula Clinical Trials Unit; Plymouth University Peninsula Schools of Medicine and Dentistry; Plymouth UK