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. 2016 Sep 7;14(1):68. doi: 10.1186/s12951-016-0221-x

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© The Author(s) 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. 3 — Time dependent uptake curves of free mTHPC (a), 50 nm M-Lipidots (b) and 120 nm M-Lipidots (c) established by widefield fluorescence measurement in CAL-33 spheroids. RFU relative fluorescence units. Concentration for all treatments: 7.34 µM mTHPC