@article{oliveira_maya_nogueira_conceição_bianco_barbosa_2021,  title={Fertility preservation in breast cancer with oral progestin: is it an option? A pilot study},  volume={19},  ISSN={1679-4508},  url={https://doi.org/10.31744/einstein_journal/2021AO5859},  DOI={10.31744/einstein_journal/2021AO5859},  journal={einstein (São Paulo)},  publisher={Instituto Israelita de Ensino e Pesquisa Albert Einstein},  author={Oliveira, Renato de and Maya, Bárbara Gomes and Nogueira, Mariana Bittencourt Silva and Conceição, Gabriel Seixas and Bianco, Bianca and Barbosa, Caio Parente},  year={2021},  pages={eAO5859} }