1. Oxford University Hospitals NHS Foundation Trust, Oxford, UK
2. Leeds Teaching Hospitals NHS Trust, Leeds, UK
3. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
4. Oxford Trauma and Emergency Care, Nuffield Department of Orthopaedics, Rheumatology & Musculoskeletal Sciences, University of Oxford, Oxford, UK
5. Healthshare Ltd, London, UK