1. Department of Plastic Surgery, Stoke Mandeville Hospital, Aylesbury, United Kingdom
2. Department of Surgery and Cancer, Imperial College London, London, United Kingdom
3. Department of Plastic Surgery, Salisbury District Hospital, Salisbury, United Kingdom
4. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
5. Warwick Clinical Trials Unit, University of Warwick, Warwick, United Kingdom
6. University Hospitals Coventry and Warwickshire, Clifford Bridge Road, Coventry, United Kingdom.