@article{qin_yang_xie_zhang_wang_2016,  title={Ultrasound guidance improves the success rate of axillary plexus block: a meta-analysis},  volume={66},  ISSN={0034-7094},  url={https://doi.org/10.1016/j.bjane.2015.01.002},  DOI={10.1016/j.bjane.2015.01.002},  number={2},  journal={Revista Brasileira de Anestesiologia},  publisher={Sociedade Brasileira de Anestesiologia},  author={Qin, Qin and Yang, Debao and Xie, Hong and Zhang, Liyuan and Wang, Chen},  year={2016},  month={Mar},  pages={115–119} }