@article{xu_li_li_2018,  title={Advanced bone age as an indicator facilitates the diagnosis of precocious puberty},  volume={94},  ISSN={0021-7557},  url={https://doi.org/10.1016/j.jped.2017.03.010},  DOI={10.1016/j.jped.2017.03.010},  number={1},  journal={Jornal de Pediatria},  publisher={Sociedade Brasileira de Pediatria},  author={Xu, Yue-Qin and Li, Gui-Mei and Li, Yan},  year={2018},  month={Jan},  pages={69–75} }