1. Department of Psychology, University of Guelph, 87 Trent Lane, University of Guelph, Guelph, ON, N1G 2W1, Canada
2. Children's Health Research Institute, 800 Commissioners Road, East London, ON, N6C 2V5, Canada
3. Department of Paediatrics, Western University, 800 Commissioners Road, East London, ON, N6C 2V5, Canada
4. Children's Chronic Pain Program, McMaster Children's Hospital, 1200 Main St W, Hamilton, ON, L8N 3Z5, Canada
5. Psychology Services, Glenrose Rehabilitation Hospital, 10230–111 Avenue NW Edmonton, AB, T5G 0B7, Canada