1. Department of Plastic Surgery and Burns, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK
2. Department of Plastic, Reconstructive and Burns Surgery, Stoke Mandeville Hospital, Aylesbury, UK
3. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
4. Leeds Institute of Medical Research, University of Leeds, Leeds, UK
5. Department of Plastic and Reconstructive Surgery, Leeds Teaching Hospitals NHS Trust, Leeds, UK
6. Department of Surgery and Cancer, Imperial College London, London, UK