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Kaplan–Meier survival curves of progression-free survival (PFS) and overall survival (OS) of patients who received immune checkpoint inhibitor (ICI) rechallenge treatment. (a) PFS of non-small cell lung cancer (NSCLC) patients (n = 35) on first ICI treatment. (b) OS of NSCLC patients (n = 35) on first ICI treatment. (c) PFS of NSCLC patients (n = 35) on ICI rechallenge treatment. (d) OS of NSCLC patients (n = 35) on ICI rechallenge treatment.
