1. Mental Health Care Program, INAD, Hospital del Mar, 08003 Barcelona, Spain
2. Teaching, Research & Innovation Unit, Parc Sanitari Sant Joan de Déu, 08830 St. Boi de Llobregat, Spain
3. Department of Basic, Developmental and Educational Psychology, Autonomous University of Barcelona, 08193 Cerdanyola del Vallès, Spain
4. Centre of Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain
5. Department of Clinical & Health Psychology, Autonomous University of Barcelona, 08193 Cerdanyola del Vallès, Spain
6. Institute of Health Research of Aragon (IIS), 50009 Zaragoza, Spain
7. Department of Psychiatry, INAD, Hospital del Mar, 08003 Barcelona, Spain
8. Spinal Surgery Unit, Traumatology, Hospital del Mar, 08003 Barcelona, Spain
9. Spine Surgery Unit, Neurosurgery, Hospital del Mar, 08003 Barcelona, Spain
10. Department of Psychiatry and Forensic Medicine, Autonomous University of Barcelona, 08193 Cerdanyola del Vallès, Spain
11. INAD, Hospital del Mar, 08003 Barcelona, Spain
12. Pain Clinic Unit, Anesthesiology, Hospital del Mar, 08003 Barcelona, Spain