1. Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children, Toronto, Canada
2. Department of Psychology, University of Calgary, Calgary, Canada
3. Department of Psychology, York University, Toronto, Canada
4. Transitional Pain Service and Pain Research Unit, Department of Anesthesia and Pain Management, Toronto General Hospital, Toronto, Canada
5. Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Canada