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. 2023 Oct 5;43:47. doi: 10.1186/s41232-023-00297-z

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© The Author(s) 2023

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — The uptake of Pd-MSCs-EVs by liver organoids. A The Pd-MSCs-EVs at different concentrations were simultaneously pre-stained with PKH67 and PKH26 and then administrated into liver organoids. The uptake of extracellular vesicles was observed after 6 h or 24 h. B Semi-quantitative analysis of PKH67 staining in A. C Semi-quantitative analysis of PKH26 staining in A. Bar scale, 50 μm. *P < 0.05; **P < 0.01