1 Toronto Rehabilitation Institute (Furlan), University Health Network; Institute for Work and Health (Furlan); Department of Medicine (Furlan), University of Toronto, Toronto, Ont.; Department of Epidemiology and Preventive Medicine (Williamson), Monash University, Melbourne, Australia; Pain Management Clinic (Williamson), Fraser Health Authority, Surrey, BC andrea.furlan@uhn.ca.
2 Toronto Rehabilitation Institute (Furlan), University Health Network; Institute for Work and Health (Furlan); Department of Medicine (Furlan), University of Toronto, Toronto, Ont.; Department of Epidemiology and Preventive Medicine (Williamson), Monash University, Melbourne, Australia; Pain Management Clinic (Williamson), Fraser Health Authority, Surrey, BC.