1. Toronto Western Hospital Comprehensive Pain Program; Department of Medicine; 399 Bathurst Street Fell Pavillion 4F811 Toronto Ontario Canada M5T 2S8
2. Institute for Work & Health; 481 University Avenue, Suite 800 Toronto ON Canada M5G 2E9
3. Universities of Exeter Medical School; Institute of Health Services Research; Veysey Building Salmon Pool Lane Exeter UK EX2 4SG