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. 2017 Jul 17;14:26. doi: 10.1186/s12989-017-0207-3

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© The Author(s). 2017

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. 9 — Summary illustration depicting differential chronic lung immune and fibrotic responses at 21 days post-exposure to a tangled (t)MWCNTs or b Rod-like (r)MWCNTs. The inset in panel B highlights the postulated role of STAT1 in suppressing TGF-β1 production by epithelial cells and Smad2/3 activation levels in fibroblasts