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. 2019 Sep 6;20:204. doi: 10.1186/s12931-019-1176-x

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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 — Gene expression analysis of freshly isolated and flow-sorted primary human lung epithelial cells. a Expression levels of AT1 and AT2 differentiation markers in freshly isolated human lung epithelial cells (n = 12) b Expression levels of Wnt ligands and Fzd receptors in freshly isolated lung epithelial cells (n = 12). Mann-Whitney test * p < 0.05, ** p < 0.01, *** p < 0.001. (See also Additional file 1: Figure S1 and S2)