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. 2016 Sep 12;36:15. doi: 10.1186/s41232-016-0020-7

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© The Author(s) 2016

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 — Tissue-resident stem cells for repair and regeneration after lung injury and acute inflammation. a Schematic image of the roles of epithelial stem/progenitor cells during lung injury. b AEPCs can differentiate to AT II cells in vitro culture. c Alveolar epithelial progenitor cells (AEPCs; arrowheads) express both CD90 (mesenchymal marker) and pro-SPC (AT II marker) and are localized in the regions of hyperplasia of AT II cells in the lungs of IPF patients