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. 2018 Jun 5;9:2176. doi: 10.1038/s41467-018-04571-4

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — Programmed combination therapy at cell level. a Scheme of programmed combination therapy. b Methyl thiazolyl tetrazolium (MTT) assays of YSUCNP-PdPc@DPPC-DOX-labeled MIA PaCa-2 cells. Cells were treated with no laser irradiation (N), 730 nm laser irradiation at 46 mW cm⁻² (L), 140 mW cm⁻² (H), and their combinations with different sequences (L→L, H→H, L→H and H→L). Each condition in MTT study is tested 3 times and the average value is given. Error bars were defined as s.d. (n = 3)