1. Research Unit; Galdakao-Usansolo Hospital; Galdakao Bizkaia Spain
2. Health Services Research on Chronic Patients Network (REDISSEC); Bilbao Bizkaia Spain
3. Centro de Investigación en Cronicidad (KRONIKGUNE); Bilbao Bizkaia Spain
4. Psychology Department of Personality, Assessment and Treatment; University of Deusto; Bilbao Bizkaia Spain
5. Research Unit; Basurto University Hospital; Bilbao Bizkaia Spain
6. Traumatology Service; Galdakao-Usansolo Hospital; Galdakao Bizkaia Spain
7. Epidemiology Unit; Corporació Parc Tauli Clinic; Sabadell Barcelona Spain