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. 2019 Apr 3;16:15. doi: 10.1186/s12989-019-0298-0

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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. 3 — Microtissue viability following exposure to nanomaterials. Viability was assessed using the WST-8 assay after 4 days (a) or 7 days of exposure (b) to 0.5–10 μg/mL of the test nanomaterials. * p < 0.05, ** p < 0.01, ***p < 0.001 relative to untreated microtissues. (N = 3)