1. Multidisciplinary Pain Management Unit, Hospital Universitari i Politècnic La Fe, Av. de Fernando Abril Martorell, 106, 46026 Valencia, Spain
2. Anaesthesiology Department, Hospital Universitari i Politècnic La Fe, Av. de Fernando Abril Martorell, 106, 46026 Valencia, Spain
3. Psychiatry Department, Hospital Universitari i Politècnic La Fe, Av. de Fernando Abril Martorell, 106, 46026 Valencia, Spain
4. Multidisciplinary Pain Management Unit, Hospital Universitario Quirónsalud, Calle Diego de Velázquez, 1, 28223 Pozuelo de Alarcón, Spain
5. Surgical Specialties Department, Hospital Universitari i Politècnic La Fe, Av. de Fernando Abril Martorell, 106, 46026 Valencia, Spain
6. Research Group in Social and Nutritional Epidemiology, Pharmacoepidemiology and Public Health, Department of Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine, Faculty of Pharmacy, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Spain
7. CIBER Epidemiology and Public Health (CIBERESP), Carlos III Health Institute (ISCIII), Av. Monforte de Lemos, 3-5, Pabellón 11, Planta 0, 28029 Madrid, Spain