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Epithelial and stromal PD-L1 expression correlates with pathologic complete response (pCR). (A,B) Distributions of epithelial and stromal PD-L1 expression with quantitative scores for each field of view in two representative cases. A frequency distribution of the epithelial (C) and stromal (D) PD-L1 quantitative scores. Box plots with continuous PD-L1 scores in epithelium (E) and stroma (F) on the Y-axis and pCR or no pCR on the X-axis.
