1. Department of Anesthesiology, University of Ottawa, Canada
2. Department of Psychology, The Ottawa Hospital, University of Ottawa, Ottawa, Canada
3. The Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada
4. School of Psychology, University of Ottawa, Ottawa, Canada
5. Department of Anesthesiology, Thunder Bay Regional Health Sciences Centre, Thunder Bay, Canada
6. Clinical Epidemiology Program, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada