@article{carvalho_maglioni_machado_araújo_silva_silva_2018,  title={Prevalence and characteristics of chronic pain in Brazil: a national internet-based survey study},  volume={1},  ISSN={2595-3192},  url={https://doi.org/10.5935/2595-0118.20180063},  DOI={10.5935/2595-0118.20180063},  number={4},  journal={BrJP},  publisher={Sociedade Brasileira para o Estudo da Dor},  author={Carvalho, Ravena Carolina de and Maglioni, Caio Bustamante and Machado, Gabriel Barbosa and Araújo, João Eduardo de and Silva, Josie Resende Torres da and Silva, Marcelo Lourenço da},  year={2018},  month={Oct},  pages={331–338} }