Heterogeneity of programmed death-ligand 1 expression and infiltrating lymphocytes in paired resected primary and metastatic non-small cell lung cancer

Jianghua Wu, Wei Sun, Xin Yang, Haiyue Wang, Xinying Liu, Kaiwen Chi, Lixin Zhou, Xiaozheng Huang, Luning Mao, Shuai Zhao, Tingting Ding, Bin Meng, Dongmei Lin