1 Department of Plastic and Reconstructive Surgery, Charing Cross Hospital, Fulham Palace Rd, Hammersmith, London W6 8RF, United Kingdom. Electronic address: jonathan.dunne1@nhs.net.
2 Department of Plastic and Reconstructive Surgery, John Hopkins Hospital, 1800 Orleans Street, Baltimore, MD, United States of America.
3 Department of Plastic and Reconstructive Surgery, Stoke Mandeville Hospital, Mandeville Rd, Aylesbury HP21 8AL, United Kingdom; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, United Kingdom.
4 Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, United Kingdom; Department of Plastic and Reconstructive Surgery, Imperial College Healthcare NHS Trust, St Mary's Hospital, Praed St, London W2 1NY, United Kingdom.
5 Department of Plastic and Reconstructive Surgery, St George's Hospital, Blackshaw Road, London SW17 0QT, United Kingdom.