8 Department of Engineering Science, University of Oxford, Oxford, UK; PLASTA UK Executive Committee, 2020 UK.
9 Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; PLASTA UK Executive Committee, 2020 UK.
10 Blond McIndoe Laboratories, University of Manchester, Manchester, UK; PLASTA UK Executive Committee, 2020 UK. Electronic address: ralph.murphy@nhs.net.