CD274 and neoplasm: A recent study showed that the SP142 clone, which we used in this study, exhibits fewer stained tumor cells than the other clones for PD‐L1 antibody (22C3, 28‐8, and SP263), but it was tested in non–small‐cell lung cancer.45 Therefore, we additionally immunostained EBV+ iDLBCL with E1J2J and 28‐8 antibodies, which resulted in no difference from the SP142 clone data.