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Overall survival curves according to CD155 expression and PD-L1 expression. (Left) Comparison among all groups and (right) comparison between the CD155+/PD-L1+ group and others (CD155+/PD-L1−, CD155-/PD-L1+ and CD155-/PD-L1−). CD155−, CD155 expression-negative; CD155+, CD155 expression-positive; PD-L1, programmed death-ligand 1; PD-L1−, PD-L1 expression-negative; PD-L1+, PD-L1 expression-positive.
