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. 2021 Aug 6;11:628531. doi: 10.3389/fonc.2021.628531

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Copyright © 2021 Hu, Zhang, Zhi, Li, Wen, Li, Mei and Huang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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PDL1 immunohistochemical analysis. (A, B) Immunohistochemical analysis of PDL1. The percentage of positive-stained cells was 1% (X200); (C) Positive control image of immunohistochemical analysis of PDL1 (X200). (D) Negative control imaging of immunohistochemical analysis of PDL1 (X200). PDL1, programmed cell death ligand 1.