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. 2020 Jan 22;9:1545. doi: 10.3389/fonc.2019.01545

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Copyright © 2020 Wang, Xiang, Yu, Hu, Chen, Wang, Nie and Cheng.

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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(A) HE(x200). (B) Immunohistochemical (IHC, x400) CD8+, CD4+, FOXP3+Tregs, and PD-L1 of Tonsil (positive tissue) and breast tumor. (C) Immunofluorescence (IF, x20) Blue: DAPI; Red: CD105; Green: NG2 (The short arrow shows microvessels not covered by pericyte cells, the long arrow shows microvessels covered by pericyte cells).