Circulating immune biomarkers in peripheral blood correlate with clinical outcomes in advanced breast cancer.

PD-1 expression from CD4 + T and CD8 + T lymphocytes in ABC PD-1+ T lymphocyte levels decrease in ABC patients Basal total PD-1+ T and CD4+ PD-1+ T lymphocyte levels before starting treatment in ABC patients were slightly lower than in HW, but differences did not reach statistical significance.

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