1. Toronto Rehabilitation Institute, University Health Network, University of Toronto Centre for the Study of Pain Toronto Canada
2. School of Rehabilitation Science McMaster University Hamilton Canada
3. Department of Anesthesia and Pain Management Toronto General Hospital, University Health Network, and the University of Toronto Centre for the Study of Pain Toronto Canada
4. Toronto General Hospital Research Institute, University Health Network Toronto Canada
5. Department of Medicine, Division of Physical Medicine and Rehabilitation University Health Network Toronto Canada