Ferreira, V.C. et al. 2020. Uso de Opioides no Tratamento da Dor Crônica / Use of Opioids in the Treatment of Chronic Pain. ID on line. Revista de psicologia. 14, 53 (dez. 2020), 522–534. DOI:https://doi.org/10.14295/idonline.v14i53.2797.