1. Department of Colorectal Surgery, Chelsea and Westminster Hospital, London, UK
2. Department of Anaesthesia, Chelsea and Westminster Hospital, London, UK
3. Department of Advanced Medical and Surgical Sciences, Universitá degli Studi della Campania “Luigi Vanvitelli", Naples, Italy
4. Department of Colorectal Surgery, Vall d’Hebron University Hospital, Barcelona, Spain
5. Department of Colorectal Surgery, Royal Marsden Hospital, London, UK
6. Department of Surgery and Cancer, Imperial College, London, UK