@article{cardoso_sá_graça_reis_almeida_pinheiro_machado_2017,  title={Sphenopalatine ganglion block for postdural puncture headache in ambulatory setting},  volume={67},  ISSN={0034-7094},  url={https://doi.org/10.1016/j.bjane.2016.09.003},  DOI={10.1016/j.bjane.2016.09.003},  number={3},  journal={Revista Brasileira de Anestesiologia},  publisher={Sociedade Brasileira de Anestesiologia},  author={Cardoso, José Miguel and Sá, Miguel and Graça, Rita and Reis, Hugo and Almeida, Liliana and Pinheiro, Célia and Machado, Duarte},  year={2017},  month={Mar},  pages={311–313} }