1. Department of Trauma and Orthopaedics, University College London Hospitals NHS Foundation Trust, London, UK
2. Queen Mary University of London, London, UK
3. Department of Trauma and Orthopaedics, Hillingdon Hospital, London, UK
4. Department of Radiology, University College Hospital, London, UK
5. Department of Trauma and Orthopaedics, University College Hospital, London, UK