@article{sager_lopez_duran_burek_perazzo_2009,  title={Transforming growth factor-β1 in congenital ureteropelvic junction obstruction: diagnosis and follow-up},  volume={35},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-55382009000300008},  DOI={10.1590/S1677-55382009000300008},  number={3},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Sager, Cristian and Lopez, Juan C. and Duran, Victor and Burek, Carol and Perazzo, Ernesto},  year={2009},  month={May},  pages={315–325} }