1. Department of Health Information and Decision Sciences (CIDES); Faculty of Medicine; University of Porto; Porto Portugal
2. CINTESIS - Centre for Health Technology and Services Research; University of Porto; Porto Portugal
3. National Observatory of Pain - NOPain (OBSERVDOR); Faculty of Medicine; University of Porto; Porto Portugal
4. Department of Experimental Biology; Faculty of Medicine; University of Porto; Porto Portugal
5. IBMC - Institute for Molecular and Cell Biology; University of Porto; Porto Portugal
6. Pain Medicine Unit; Department of Anesthesiology; Porto Hospital Center (Centro Hospitalar do porto, EPE); Porto Portugal
7. Multidisciplinary Chronic Pain Management Unit and Department of Anesthesiology; Senhora da Oliveira Hospital; Guimaraes (Centro Hospitalar Alto Ave EPE - Guimaraes); Guimaraes Portugal
8. Pain Medicine Unit; Pedro Hispano Hospital (Unidade Local de Saśde de Matosinhos EPE); Matosinhos Portugal
9. Pain Medicine Unit; General Hospital; Coimbra University Hospital Centre (Centro Hospitalar e Universitįrio de Coimbra EPE); Coimbra Portugal
10. Pain Medicine Unit; Santo António dos Capuchos Hospital - Lisboa Central Hospital Centre (Centro Hospitalar Lisboa Central, EPE); Lisboa Portugal