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Kaplan–Meier survival curves according to the combined status of lipocalin‐2 expression and neutrophil‐lymphocyte ratio (NLR) in patients with limited‐stage small cell lung cancer. (a) Progression‐free survival (PFS) and (b) overall survival (OS) for patients stratified by the combination of lipocalin‐2 and NLR. (c) PFS and (d) OS for patients stratified into three groups based on the combined status of lipocalin‐2 and NLR.
