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. 2016 Mar 29;13:16. doi: 10.1186/s12989-016-0127-7

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© Hiraku et al. 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 — Cytotoxic effect of MWCNT. A549 cells were treated with 1 μg/ml MWCNT for 24 h at 37 °C, and the cell viability was examined by MTT assay as described in Methods. Viability of the control cells was set at 100 %. Data represent means ± SD of 4-6 independent experiments. ***p < 0.001, compared with the control by two-way ANOVA followed by Tukey’s test