1. Unit for the Study and Treatment of Pain - ALGOS; Catalonia Spain
2. Department of Psychology; Research Center for Behavior Assessment (CRAMC); Universitat Rovira i Virgili; Catalonia Spain
3. Institut d'Investigació Sanitària Pere Virgili; Universitat Rovira i Virgili; Catalonia Spain
4. Lawson Health Research Institute; London ON Canada
5. Beryl & Richard Ivey Rheumatology Day Programs; St. Joseph's Health Care; London ON Canada
6. Clinical and Neurological Sciences Department; Schulich School of Medicine & Dentistry; University of Western Ontario; London ON Canada
7. Department of Rehabilitation Medicine; University of Washington; Seattle WA USA