Dimitrios Patsouras1, Alexis Schizas2, Mark L George3. 1. Department of Colorectal Surgery, Guy's and St Thomas' NHS Foundation Trust, London, UK. d.patsouras@gmail.com. 2. Department of Colorectal Surgery, Guy's and St Thomas' NHS Foundation Trust, London, UK. Alexis.Schizas@gstt.nhs.uk. 3. Department of Colorectal Surgery, Guy's and St Thomas' NHS Foundation Trust, London, UK. Mark.George@gstt.nhs.uk.