Jonathan Kam1, Thomas J Hugh2, Anthony Joseph3. 1. Senior Resident Medical Officer, Royal North Shore Hospital, St Leonards, NSW, Australia, and Conjoint Fellow, Faculty of Medicine, University of Newcastle, Australia. 2. Head of Department, Upper Gastrointestinal Surgical Unit, Royal North Shore Hospital, St Leonards, NSW, Australia, and Discipline of Surgery, University of Sydney, Australia. 3. Head of Department, Trauma Unit, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia, and Discipline of Emergency Medicine, University of Sydney, 2006, Australia.