1. The Hull York Medical School, Heslington, York, North Yorkshire YO10 5DD, United Kingdom
2. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, University of Oxford, Windmill Road, Oxford, OX3 7LD, United Kingdom
3. St Andrews Centre for Plastic Surgery and Burns, Broomfield Hospital, Chelmsford, Essex, CM1 7ET, United Kingdom
4. Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Hills Rd, Cambridge CB2 0QQ, United Kingdom