Portuguese Version of the Pain Beliefs and Perceptions Inventory: A Multicenter Validation Study - Azevedo, L.F.; Sampaio, R.; Camila Dias, C.; Romão, J.; Lemos, L.; Agualusa, L.; Vaz-Serra, S.; Patto, T.; Costa-Pereira, A.; Castro-Lopes, J.M. (Pain Practice, 2017)