1. North Bristol NHS Trust, Westbury on Trym, UK
2. Musculoskeletal Research Unit, University of Bristol, Bristol, UK
3. Translational Health Sciences, University of Bristol, Bristol, UK
4. National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK
5. Oxford Trauma, NDORMS, University of Oxford, Oxford, UK