Zhiqiang, Z., Jie, M., Dexin, Y., Haoqiang, S. and Dongdong, X. (2014) “Renal collision tumour of papillary cell carcinoma and chromophobe cell carcinoma with sarcomatoid transformation: A case report and review of the literature”, Canadian Urological Association Journal, 8(7-8), pp. e536–9. doi: 10.5489/cuaj.1811.