1. Health Education North East, Waterfront 4, Goldcrest Way, Newcastle upon Tyne, NE15 8NY, UK
2. Department of Trauma and Orthopaedics, South Tyneside and Sunderland NHS Foundation Trust, Harton Ln, South Shields NE34 OPL, UK
3. Department of Trauma and Orthopaedics, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge CB2 0QQ, UK
4. Department of Trauma and Orthopaedics, Northumbria NHS Foundation Trust, Unit 7-8 Silver Fox Way Cobalt Business Park, Silver Fox Way, Newcastle upon Tyne NE27 0QJ, UK