1. Department of Emergency Medicine; The University of Western Australia; Perth Western Australia Australia
2. Emergency Department, Princess Alexandra Hospital; Brisbane Queensland Australia
3. Emergency Department; John Hunter Hospital; Newcastle New South Wales Australia
4. Department of Emergency Medicine; Washington University School of Medicine in St. Louis; St. Louis Missouri USA
5. Emergency Department, Liverpool Hospital; Sydney New South Wales Australia
6. Faculty of Health and Medical Sciences; The University of Adelaide; Adelaide South Australia Australia