Chen, S., Xu, B., Liu, N., Jiang, H., Zhang, X., Yang, Y., Liu, J., Sha, G., Zhu, W. and Chen, M. 2015. Improved effectiveness and safety of flexible ureteroscopy for renal calculi (<2 cm): A retrospective study. Canadian Urological Association Journal. 9, 5-6 (May 2015), E273–7. DOI:https://doi.org/10.5489/cuaj.2649.