Xu, G., Sun, L., Li, Y., Xie, F., Zhou, X., Yang, H., . . . Mao, Y. (2019). The Clinicopathological and Prognostic Value of PD-L1 Expression in Cholangiocarcinoma: A Meta-Analysis. Front Oncol.

Xu, Gang, Lejia Sun, Yunzhu Li, Feihu Xie, Xiaoxiang Zhou, Huayu Yang, Shunda Du, Haifeng Xu, و Yilei Mao. "The Clinicopathological and Prognostic Value of PD-L1 Expression in Cholangiocarcinoma: A Meta-Analysis." Front Oncol 2019.

Xu, Gang, et al. "The Clinicopathological and Prognostic Value of PD-L1 Expression in Cholangiocarcinoma: A Meta-Analysis." Front Oncol 2019.