1. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD, United Kingdom
2. St Andrew`s Centre for Plastic Surgery and Burns, Broomfield Hospital, Chelmsford, CM1 7ET, United Kingdom
3. Hull York Medical School, Hull University, Hull, HU6 7RX, United Kingdom