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Kaplan-Meier curve of (A) OS and (B) PFS of post-CS group and pre-CS group to non-CS group. a) Log-rank test, non-CS vs post-CS, b) Log-rank test, non-CS vs pre-CS; non-CS, not systemically administered corticosteroids; post-CS, systemic corticosteroid administration initiated during nivolumab treatment; pre-CS, systemic corticosteroid administration before the first cycle of nivolumab administration.
