PD-L1 and PD-L2 Expression in Pancreatic Ductal Adenocarcinoma and Their Correlation with Immune Infiltrates and DNA Damage Response Molecules

The authors investigated the expression of two PD-1 ligands, PD-L1 and PD-L2, in pancreatic ductal adenocarcinoma, analysed their role in survival, and explored their correlation with clinicopathological features, immune infiltration, and DNA damage response molecules.