H Al Furajii1,2, R A Cahill3,4. 1. Department of Colorectal Surgery, Mater Misericordiae University Hospital, 47 Eccles Street, Dublin 7, Ireland. 2. Department of Surgery, School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland. 3. Department of Colorectal Surgery, Mater Misericordiae University Hospital, 47 Eccles Street, Dublin 7, Ireland. ronan.cahill@ucd.ie. 4. Department of Surgery, School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland. ronan.cahill@ucd.ie.