1. Department of Surgery, Brighton & Sussex University Hospitals NHS Trust, Eastern Road, Brighton BN2 5BE, UK
2. Department of Surgery, Basildon & Thurrock University Hospitals NHS Foundation Trust, Nethermayne, Basildon, Essex SS16 5NL, UK
3. Department of General, Endocrine and Gastrointestinal Surgery and Oncology, Poznan University of Medical Sciences, Przybyszewskiego 49, 60-355 Poznan, Poland
4. Computational and Systems Medicine, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Sir Alexander Fleming Building, South Kensington Campus, London SW7 2AZ, UK
5. Department of Colorectal Surgery, St Mark’s Hospital, Watford Road, Middlesex, Harrow HA1 3UJ, UK
6. Department of Surgery & Cancer, Imperial College London, 10th Floor, QEQM Building, St Mary’s Hospital, South Wharf Road, London W2 1NY, UK
7. Department of Colorectal Surgery, University College London Hospital (UCLH), 235 Euston Road, Fitzrovia, London NW1 2BU, UK