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. 2019 Jun 17;12:56. doi: 10.1186/s13048-019-0526-0

Fig. 1.

Fig. 1

The representative cases of PD-L1 expression in tumor cell membrane (a magnification, × 400), stromal tumor-infiltrating lymphocytes (b magnification, × 400), and intraepithelial tumor-infiltrating lymphocytes (c magnification, × 400). Insets showed negative control for PD-L1 immunostaining (magnification, × 400)