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. 2019 Aug 16;20:185. doi: 10.1186/s12931-019-1162-3

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Representative image of HE staining for TBB and Cryo and PD-L1 ≥ 50% with the same patient (Adenocarcinoma 10×). a, HE staining for TBB specimens. b, HE staining for Cryo specimens. c, PD-L1 ≥ 50% for Cryo specimens. HE, hematoxylin and eosin; PD-L1, programmed death ligand 1; TBB, transbronchial biopsy; Cryo, Cryobiopsy