1. Faculty of Medicine University of Toronto Toronto Ontario Canada
2. Institute of Health Policy, Management and Evaluation University of Toronto Toronto Ontario Canada
3. Emergency Department The Prince Charles Hospital Brisbane Queensland Australia
4. Emergency Department St Andrew's War Memorial Hospital Brisbane Queensland Australia
5. Emergency Department Derriford Hospital Plymouth UK
6. Emergency Department Auckland City Hospital, Auckland District Health Board Auckland New Zealand
7. Department of Surgery The University of Auckland Auckland New Zealand
8. Department of Emergency Medicine Cumming School of Medicine, University of Calgary Calgary Alberta Canada
9. Department of Emergency Medicine Alberta Health Services Calgary Alberta Canada