1. Alcohol & Drug Treatment Program, Credit Valley Hospital, Mississauga, Ontario, Canada
2. Departments of Physical Medicine and Rehabilitation/Psychiatry, McMaster University, Hamilton, Ontario, Canada
3. Department of Anaesthesia, University of Toronto, St Michael’s Hospital Pain Clinic, Pain Management Programme, Sunnybrook and Women’s College Health Sciences Programme, Toronto, Ontario, Canada
4. Mount Sinai Hospital, Toronto, Ontario and Department of Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada
5. Department of Family Medicine, University of Alberta, Edmonton, Alberta, Canada
6. Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia and Pain Management Unit, Queen Elizabeth II Health Sciences Centre, Halifax, Nova Scotia, Canada
7. Departments of Clinical Neurological Sciences and Oncology, University of Western Ontarion, London, Ontario, Canada