@article{flumignan_seike_souza_cirqueira_silva_artifon_2021,  title={DIFFICULT BILIARY CANNULATION: SHOULD WE ALWAYS TRY A SECOND ERCP AFTER A FAILED NEEDLE-KNIFE FISTULOTOMY?},  volume={58},  ISSN={0004-2803},  url={https://doi.org/10.1590/S0004-2803.202100000-91},  DOI={10.1590/S0004-2803.202100000-91},  number={4},  journal={Arquivos de Gastroenterologia},  publisher={Instituto Brasileiro de Estudos e Pesquisas de Gastroenterologia e Outras Especialidades - IBEPEGE. },  author={FLUMIGNAN, Victor Kalil and SEIKE, Marina Garcia and SOUZA, Victória Soares de and CIRQUEIRA, Matheus Iguera and SILVA, Ana Beatriz and ARTIFON, Everson Luiz de Almeida},  year={2021},  month={Oct},  pages={509–513} }