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OS rates of non-small cell lung cancer according to TLR4 and PD-L1 expression levels. (A) Positive TLR4 staining is associated with decreased OS (P=0.0143). (B) Positive PD-L1 staining is associated with decreased OS (P=0.0353). (C) Positive combined PD-L1 and TLR4 staining is associated poorer OS (P=0.0091). OS, overall survival; TLR4, toll-like receptor; PD-L1, programmed-death ligand 1.
