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. 2020 Nov 9;10:19295. doi: 10.1038/s41598-020-76343-4

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© The Author(s) 2020

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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Flow cytometry analysis of the proportion of green fluorescent cells in the nasal mucosa of mice transplanted with GFP-labeled hUCMSCs on days 7, 14, and 21. (A) was obtained on day 7. (B) was obtained on day 14. (C) was obtained on day 21. The red line indicates the normal control group, the blue line indicates the nasal drip group, the orange line indicates the intraperitoneal injection group, and the green line indicates the tail vein injection group. By comparison with the blank group, it was found that the mice in each group had different proportions of fluorescent cells on the 7th and 14th days, with the most cells observed on the 14th day, but the proportion of fluorescent cells on the 21st day was close to zero.