1. Department of Emergency Medicine; Dalhousie University; Halifax Nova Scotia Canada
2. Pediatric Emergency Research Group; Children's Hospital of Eastern Ontario Research Institute; Ottawa Ontario Canada
3. Department of Pediatrics; University of Alberta; Edmonton Alberta Canada
4. Clinical Research Unit; Children's Hospital of Eastern Ontario Research Institute; Ottawa Ontario Canada
5. Department of Pediatrics; University of Toronto; Toronto Ontario Canada
6. Department of Pediatrics; University of Western Ontario; London Ontario Canada
7. Department of Pediatrics; CHU Sainte-Justine; Montreal Quebec Canada
8. Department of Pediatrics; McGill University; Montreal Quebec Canada
9. Pediatric Emergency Medicine; Columbia University Medical Centre; New York NY
10. Department of Pediatrics; University of Calgary; Calgary Alberta Canada
11. Department of Pediatrics; University of Manitoba; Winnipeg Manitoba Canada
12. Department of Pediatrics; Dalhousie University; Halifax Nova Scotia Canada
13. Department of Pediatrics; University of Ottawa; Ottawa Ontario Canada