Charbel Karam1,2, Izhar-Ul Haque1, Miriam Fewtrell3, Amitabha Das1,2. 1. Department of Upper Gastrointestinal Surgery, Bankstown-Lidcombe Hospital, Sydney, New South Wales, Australia. 2. School of Medicine, The University of New South Wales, Sydney, New South Wales, Australia. 3. Department of Anatomical Pathology, Liverpool Hospital, Sydney, New South Wales, Australia.