Osman, H., Yan, J.H., Chan, J., Munir, J., Alrasheed, S., Krishna, S. and Schieda, N. 2021. Inter-observer and intra-observer agreement of Bosniak classification of cystic renal masses: Comparison between original version to version 2019 and effect of an online support calculator. Canadian Urological Association Journal. 15, 12 (Jun. 2021), 420–2. DOI:https://doi.org/10.5489/cuaj.7369.