Expression of PD-1/PD-L1 in primary breast tumours and metastatic axillary lymph nodes and its correlation with clinicopathological parameters.

Sci Rep · 2019 · PMC6779893 · PMID 31591439

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did not reach statistical significanceno p-value reported

However, the correlation between positive PD-L1 expression by immune cells and the objective response rate did not reach statistical significance in multiple cancers 13 .

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