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. 2019 Jan 31;18:11. doi: 10.1186/s12938-019-0624-7

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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. 4 — Quantification of the cellular uptake of FITC-DTX-NPs by flow cytometry at 1, 2 and 4 h, respectively. Flow cytometry histogram overlays (a). The percentage uptake of FITC-DTX-NPs at different incubation times (b)