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. 2019 Nov 21;20:262. doi: 10.1186/s12931-019-1236-2

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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 IHC staining of Biomarkers in LELC and squamous carcinoma CK5/6, P40, P63 and PCK were all positive in both of LELC and squamous carcinoma samples; in parallel, TTF-1, CgA and Syn were negative without exception in the two types of cancer. However, PD-L1 and EBER had been detected only in LELC, but not in squamous carcinoma (×200)