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. 2022 Jun 3;12:908907. doi: 10.3389/fonc.2022.908907

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Copyright © 2022 Lin, Ma, Cao, Ning and Tan

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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Representative images of immunohistochemical features of high-level and low-level tumor-infiltrating inflammatory cells in hilar cholangiocarcinoma: CD3⁺T cells, CD4⁺ T cells and CD8⁺T cells. (×400 magnification).