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. 2018 Apr 20;18:448. doi: 10.1186/s12885-018-4264-2

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© The Author(s). 2018

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. 1 — Effects of CQ and/or zinc on the viability of HeLa cells. CQ (a) or CQ combined with zinc (b) induced cytotoxicity in HeLa cells. Cells were exposed to the indicated concentrations of CQ or CQ combined with zinc for 72 h. Cell cytotoxicity was assessed by the CCK-8 assay. The data are shown as means ± SEM of three independent experiments