1. Department of Surgery, St Mark's Hospital, Harrow, United Kingdom
2. Department of Visceral Surgery, University Hospital CHUV, Lausanne, Switzerland
3. Department of Surgery, University of Edinburgh and Colorectal Unit, Western General Hospital, Edinburgh, United Kingdom
4. Department of Surgery and Cancer, Imperial College London, London, United Kingdom
5. Department of Surgery, Örebro University Hospital, Örebro, Sweden
6. Department of Surgery, University of Manchester, Manchester, United Kingdom
7. Department of Surgery, Salford Royal Hospital, Manchester, United Kingdom