@article{monga_2011,  title={Narrow-band imaging digital flexible ureteroscopy in detection of upper urinary tract transitional-cell carcinoma: initial experience},  volume={37},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-55382011000200015},  DOI={10.1590/S1677-55382011000200015},  number={2},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Monga, Manoj},  year={2011},  month={Mar},  pages={271–271} }