[1] Univ Rovira & Virgili, Unit Study & Treatment Pain ALGOS, Res Ctr Behav Assessment CRAMC, Dept Psychol, Tarragona, Spain
[2] Inst Invest Sanitaria Pere Virgili, Tarragona, Spain
[3] Univ Washington, Dept Rehabil Med, Seattle, WA 98195 USA
[4] Univ Western Ontario, Clin & Neurol Sci Dept, Schulich Sch Med & Dent, London, ON, Canada