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HLA-DR level in cytotoxic T cells has prognostic value. Progression-free survival of breast cancer patients divided in HLA-DR high in cytotoxic T cells (CTLs) (black line, n = 72) and HLA-DR low in CTLs (red line, n = 68); this segregation was performed according to the threshold value given by the ROC curve with data from both cohorts.
