1. Departments of Pediatrics,
2. Clinical Neurosciences,
3. Alberta Children's Hospital Research Institute for Children and Maternal Health, Calgary, Alberta, Canada; and
4. Behavioural Research Unit and
5. Psychology, and
6. Division of Pediatric Emergency, Department of Pediatrics, Alberta Children's Hospital, Calgary, Alberta, Canada
7. Community Health Sciences, University of Calgary, Calgary, Alberta, Canada;