@article{liu_wang_wu_kong_ni_2019,  title={The Harbin Medical University nephrectomy score: a quantitative system for evaluating the complexity of laparoscopic retroperitoneal simple nephrectomy},  volume={45},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-5538.IBJU.2018.0634},  DOI={10.1590/S1677-5538.IBJU.2018.0634},  number={6},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Liu, Yiwen and Wang, Chunyang and Wu, Xiuhai and Kong, Linglong and Ni, Shaobin},  year={2019},  month={Nov},  pages={1144–1152} }