Wang, Yu, Haofeng Lu, and Mi Li. “Expression of PD-L1 and PD-1 in Stage T4 Rectal Cancer Tissues and Surrounding Metastatic Lymph Nodes and Correlation With Prognosis: PD-L1 and PD-1 in Rectal Cancer Tissues”. Cellular and Molecular Biology 68, no. 8 (August 31, 2022): 74–78. Accessed November 21, 2024. https://mail.cellmolbiol.org/index.php/CMB/article/view/4496.