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Prognostic significance of PD-L1 expression alone or combined with evaluation of FOXP3+ Tregs in breast cancer patients. Kaplan-Meier survival curve for (A) OS and (B) RFS depending on the expression of PD-L1. (C) OS and (D) RFS depending on the tumor FOXP3+ Treg infiltration. (E) OS and (F) RFS depending on the PD-L1 expression combined with the tumor FOXP3+ Treg infiltration. p-values were calculated by the log-rank test.
