1 Department of Sarcoma and General Surgery, Midlands Abdominal and Retroperitoneal Sarcoma Unit, University Hospital Birmingham NHS Foundation Trust, Birmingham, UK.
2 Department of Sarcoma Surgery, The Royal Marsden NHS Foundation Trust, Fulham Road, London, UK.
3 Department of Sarcoma and General Surgery, Midlands Abdominal and Retroperitoneal Sarcoma Unit, University Hospital Birmingham NHS Foundation Trust, Birmingham, UK. Electronic address: max.almond@uhb.nhs.uk.