In another study, PD-L1 expression level was positively correlated with the number of PD-1-positive T cells in activated B-cell-like (ABC)-subtype DLBCL specimens, but was negatively correlated with the number of forkhead box P3 (FOXP3)-positive regulatory T cells in GCB-subtype DLBCL specimens [5]. Here, FOXP3 is linked to diffuse large B-cell lymphoma.