1. Pain & Wellness Center, Vaughan, ON L6A 3Z3, Canada
2. Department of Medicine, Division of Physical Medicine and Rehabilitation, University of Toronto, Toronto, ON M5S 3H2, Canada
3. Comprehensive Integrated Pain Program, Toronto Rehabilitation Institute, Toronto, ON M5G 2A2, Canada
4. Institute of Medical Sciences, Temerty Faculty of Medicine, University of Toronto, ON M5S 1A8, Canada