H Jayamanne1, M Elnaghi2, E S McKain2, B M Stephenson2. 1. Department of General Surgery, Royal Gwent Hospital, Aneurin Bevan University Health Board, Newport, NP20 2UB, South Wales, UK. harshajayman@yahoo.com. 2. Department of General Surgery, Royal Gwent Hospital, Aneurin Bevan University Health Board, Newport, NP20 2UB, South Wales, UK.