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Kaplan‐Meier survival curve analysis of the relationship between the pretreatment albumin‐to‐globulin ratio (AGR) (A), the fibrinogen‐to‐albumin ratio (FAR) (B), the prealbumin‐to‐globulin ratio (PGR) (C), and the fibrinogen‐to‐prealbumin ratio (FPR) (D), and progression‐free survival (PFS)
