1. Department of Rehabilitation Medicine University of Washington Seattle Washington U.S.A
2. Unit for the Study and Treatment of Pain – ALGOS Universitat Rovira i Virgili Tarragona Spain
3. Department of Clinical Neurological Sciences Schulich School of Medicine & Dentistry Western University London Ontario Canada
4. Department of Psychology Research Center for Behavior Assessment (CRAMC) Universitat Rovira i Virgili Tarragona Spain
5. Institut d'Investigació Sanitària Pere Virgili Universitat Rovira i Virgili Tarragona Spain
6. Pain Management Unit Nova Scotia Health Authority Halifax Nova Scotia Canada