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PD-L1, Treg cells, CD8, and CD68 expressions are associated with the efficacy of CCRT. Spearman’s correlation analysis indicates that expressions of PD-L1, Treg cells, CD8, and CD68 are correlated with curative effect; CR + PR: n = 49; SD + PD: n = 6; CR, complete response; PR, partial response; SD, stable disease; PD, progressive disease; PD-L1, programmed death ligand 1; CCRT, concurrent chemoradiotherapy.
