Comparison contrast-enhanced CT with contrast-enhanced US in diagnosing combined hepatocellular-cholangiocarcinoma: a propensity score-matched study oleh Jie Yang, Yun Zhang, Wu-yong-ga Bao, Yi-di Chen, Hanyu Jiang, Jia-yan Huang, Ke-yu Zeng, Bin Song, Zi-xing Huang, Qiang Lu