1. Department of Psychology, Dalhousie University, Halifax, Nova Scotia, Canada
2. Centre for Pediatric Pain Research, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia, Canada
3. Departments of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada
4. Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
5. Anesthesiology, Dalhousie University, Halifax, Nova Scotia, Canada