1. Imperial College London, London, SW7 2AZ, United Kingdom
2. St Andrews Centre for Plastic Surgery and Burns, Broomfield Hospital, Court Road, Broomfield, Chelmsford, CM1 7ET, United Kingdom
3. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford, OX3 7LD, United Kingdom
4. Division of Trauma and Orthopaedic Surgery, University of Cambridge, Addenbrooke’s Hospital, Cambridge, CB2 2QQ, United States