1. Midlands Abdominal and Retroperitoneal Sarcoma Unit (MARSU), Queen Elizabeth Hospital Birmingham, Birmingham B15 2GW, UK
2. Institute of Applied Health Research, University of Birmingham, Birmingham B15 2TT, UK
3. Academic Department of Military Surgery and Trauma, Royal Centre for Defence Medicine, Birmingham B15 2SQ, UK
4. Department of General Surgery, Division of Surgical Oncology, The Ottowa Hospital, 501 Smyth Road, Ottawa, ON K1H 8L6, Canada