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. 2020 Feb 6;12(2):376. doi: 10.3390/cancers12020376

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Tissue CD47 and PD-L1 expression by immunohistochemistry (IHC). (A) CD47 expression on tumor cells in (i) a primary BC tumor (×200) and (ii) the corresponding skin metastasis (×400), and (B) PD-L1 expression on tumor cells (star) and tumor-infiltrating lymphocytes (TILs) (arrow) in (i) a primary BC tumor (×200) and (ii) the corresponding liver metastasis (×400).