@article{xu_tang_2017,  title={Relationship between Brain Natriuretic Peptide and Recurrence of Atrial Fibrillation after Successful Electrical Cardioversion: an Updated Meta-Analysis},  volume={32},  ISSN={0102-7638},  url={https://doi.org/10.21470/1678-9741-2017-0008},  DOI={10.21470/1678-9741-2017-0008},  number={6},  journal={Brazilian Journal of Cardiovascular Surgery},  publisher={Sociedade Brasileira de Cirurgia Cardiovascular},  author={Xu, Xiangdong and Tang, Yongqing},  year={2017},  month={Nov},  pages={530–535} }