1. Department of Anaesthesia, Leeds Teaching Hospitals NHS Trust, Leeds, UK
2. Leeds Institute of Medical Education, University of Leeds, Leeds, UK
3. James Cook University Teaching Hospital, South Tees Hospitals NHS Foundation Trust Middlesbrough, UK
4. Department of Emergency Medicine, Leeds Teaching Hospitals NHS Trust, Leeds, UK
5. Department of Radiology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
6. Department of Emergency Medicine, Dewsbury and District Hospital, Mid Yorkshire Hospitals NHS Trust, Wakefield, UK
7. Department of Rheumatology, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK