1. Faculty of Medicine, Division of Health Sciences and Graduate Entry Medicine, University of Nottingham at Derby, Royal Derby Hospital , Derby, UK
2. Department of Colorectal Surgery, Bradford Royal Infirmary , Bradford, UK
3. Department of Anaesthesia, Medway Maritime Hospital , Kent, UK
4. Department of Colorectal Surgery, Royal Derby Hospital , Derby, UK
5. Department of Colorectal Surgery, Royal Alexandra Hospital , Paisley, UK