@article{özhan_çaparlar_süzer_eskin_atik_2021,  title={Comparison of three sitting positions for combined spinal - epidural anesthesia: a multicenter randomized controlled trial},  volume={71},  ISSN={2352-2291},  url={https://doi.org/10.1016/j.bjane.2020.12.012},  DOI={10.1016/j.bjane.2020.12.012},  number={2},  journal={Brazilian Journal of Anesthesiology},  publisher={Sociedade Brasileira de Anestesiologia (SBA)},  author={Özhan, Mehmet Özgür and Çaparlar, Ceyda Özhan and Süzer, Mehmet Anıl and Eskin, Mehmet Burak and Atik, Bülent},  year={2021},  month={Mar},  pages={129–136} }