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Overall survival (OS) according to NLR and PLR: (A) post-CCRT NLR, (B) NLR change (post-CCRT NLR / pre-CCRT NLR), and (C) post-CCRT PLR. NLR, neutrophil-to-lymphocyte ratio; PLR, platelet-to-lymphocyte ratio; CCRT, concurrent chemoradiotherapy.
