@article{arora_gupta_arya_bhatia_2018,  title={Efficacy of preoxygenation using tidal volume breathing: a comparison of Mapleson A, Bain's and Circle system},  volume={68},  ISSN={0034-7094},  url={https://doi.org/10.1016/j.bjane.2017.10.001},  DOI={10.1016/j.bjane.2017.10.001},  number={2},  journal={Revista Brasileira de Anestesiologia},  publisher={Sociedade Brasileira de Anestesiologia},  author={Arora, Suman and Gupta, Priyanka and Arya, Virender Kumar and Bhatia, Nidhi},  year={2018},  month={Mar},  pages={128–134} }