Emma Carlin1, Roxanne Dubash2, James Ho3, Claire Bertenshaw4. 1. Emergency Department, Wellington Regional Hospital, Wellington, New Zealand. 2. Emergency Department, Royal North Shore Hospital, Sydney, New South Wales, Australia. 3. Emergency Department, Cabrini Health, Melbourne, Victoria, Australia. 4. Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia.