1. Department of Surgery and Cancer, Imperial College London , London , UK
2. Department of Colorectal Surgery, Chelsea and Westminster Hospital NHS Foundation Trust , London , UK
3. Colorectal Surgery, Vall d’Hebron University Hospital, Universitat Autonoma de Barcelona, UAB , Barcelona , Spain
4. Department of Advanced Medical and Surgical Sciences, Università degli Studi della Campania ‘Luigi Vanvitelli’ , Naples , Italy
5. Department of Colorectal Surgery, Royal Marsden NHS Foundation Trust , London , UK