1. The Observatory of Pain University of Cádiz Cádiz Spain
2. Biomedical Research and Innovation Institute of Cádiz (INiBICA) Research Unit Puerta del Mar University Hospital, University of Cádiz Cádiz Spain
3. Preventive Medicine and Public Health Area University of Cádiz Cádiz Spain
4. Department of Nursing I, Faculty of Medicine and Nursing University of the Basque Country UPV/EHU Bizkaia Leioa Spain