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Kaplan–Meier curves for overall survival stratified by NLR levels (A), PLR (B), CEA levels (C), CA 19–9 levels (D), LDH levels (E) and CRP levels (F). PLR: the platelet-lymphocyte ratio; NLR, the neutrophil-to-lymphocyte ratio; CEA, carcinoembryonic antigen; CA 19–9, carbohydrate antigen 19–9; LDH, lactate dehydrogenase; CRP, C-reactive protein.
