1. Department of Pediatrics University of Alberta, Alberta Research Centre for Health Evidence Edmonton Alberta Canada
2. Departments of Pediatrics and Emergency Medicine University of Ottawa, Children's Hospital of Eastern Ontario Ottawa Ontario Canada
3. Sections of Pediatric Emergency Medicine and Gastroenterology, Departments of Pediatrics University of Calgary Alberta Children's Hospital and Alberta Children's Hospital Research Institute Calgary Alberta Canada
4. Departments of Pediatrics, Emergency Medicine, and Pharmacology & Physiology University of Calgary Alberta Children's Hospital and Alberta Children's Hospital Research Institute Calgary Alberta Canada
5. School of Nursing, Faculty of Health Professions Department of Emergency Medicine, Faculty of Medicine Dalhousie University Halifax Nova Scotia Canada
6. Department of Pediatrics, Emergency Medicine and Community Health Sciences University of Calgary Alberta Children's Hospital and Alberta Children's Hospital Research Institute Calgary Alberta Canada