Clinicopathological and prognostic implications of vessels encapsulate tumor clusters with PD-L1 in intrahepatic cholangiocarcinoma patients - Tao, Ping; Ma, Lijie; Xue, Ruyi; Wang, Haijie; Zhang, Si (Translational Cancer Research; Vol 9, No 5 (May 29, 2020): Translational Cancer Research, 2020)