Affiliation: | 1. Upper Gastrointestinal Surgical Unit, Royal North Shore Hospital, St Leonards, New South Wales, Australia;2. Discipline of Surgery, University of Sydney, Sydney, New South Wales, Australia;3. Department of Radiology, Royal North Shore Hospital, St Leonards, New South Wales, Australia;4. Department of Gastroenterology, Royal North Shore Hospital, St Leonards, New South Wales, Australia |