1. Departments of Pediatrics and
2. Glenrose Rehabilitation Hospital, Edmonton, Canada;
3. Department of Pediatrics, University of Calgary, Calgary, Canada;
4. Emergency Department, IWK Health Centre, Halifax, Canada;
5. Department of Pediatrics, University of British Columbia, Vancouver, Canada;
6. Department of Pediatrics, McGill University, Montreal, Quebec, Canada;
7. Department of Family and Emergency Medicine, Laval University, Quebec City, Canada;
8. Department of Pediatrics, University of Ottawa, Ottawa, Canada;
9. Department of Pediatrics, Memorial University, St John's, Canada;
10. Department of Pediatrics, University of Saskatchewan, Saskatoon, Canada; and
11. Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada