1. Foot & Ankle Unit, Royal National Orthopaedic Hospital, Stanmore, United Kingdom
2. Department of Orthopaedics & Musculoskeletal Science, University College London, London, United Kingdom
3. University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
4. Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
5. University of Liverpool, Liverpool, United Kingdom
6. Academic Team of Musculoskeletal Surgery, University Hospitals of Leicester, Leicester, United Kingdom