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. 2019 Feb 19;17:30. doi: 10.1186/s12951-019-0462-6

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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. 6 — a Growth of C6 xenografted tumors in nude mice treated with saline, Au PENPs, Au PENPs-CTX, ¹³¹I-Au PENPs, and ¹³¹I-Au PENPs-CTX, respectively. The relative tumor volume was normalized according to their initial tumor volume (mean ± SD, n = 5). b Survival rate, c H&E staining and d TUNEL assay of C6 tumor-bearing mice after various treatments (mean ± SD, n = 5). The scale bar shown in both panels represents 200 μm