CD274 and nasopharyngeal carcinoma: The expression levels of EBV-miR-BART11-3p, EBV-miR-BART11-5p, EBV-miR-BART17-3p, FOXP1, PBRM1, and PD-L1 were determined using samples of NPC and EBV-associated gastric carcinoma tissues by performing IHC or ISH methods.