@article{danilovic_2021,  title={Editorial Comment: Classification of the renal papillary abnormalities by flexible ureteroscopy: evaluation of the 2016 version and update},  volume={47},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-5538.IBJU.2021.06.04},  DOI={10.1590/S1677-5538.IBJU.2021.06.04},  number={6},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Danilovic, Alexandre},  year={2021},  month={Nov},  pages={1268–1269} }