@article{gomes_herrera_2018,  title={Etiologic role of root canal infection in apical periodontitis and its relationship with clinical symptomatology},  volume={32},  ISSN={1806-8324},  url={https://doi.org/10.1590/1807-3107bor-2018.vol32.0069},  DOI={10.1590/1807-3107bor-2018.vol32.0069},  journal={Brazilian Oral Research},  publisher={Sociedade Brasileira de Pesquisa Odontológica - SBPqO},  author={Gomes, Brenda Paula Figueiredo de Almeida and Herrera, Daniel Rodrigo},  year={2018},  pages={e69} }