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. 2020 Aug 3;19:62. doi: 10.1186/s12938-020-00800-4

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© The Author(s) 2020

Open AccessThis 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/. 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 in a credit line to the data.

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Fig. 9 — A TUNEL results (×400). B Ki67 results (×400). a–d, a1–d1 Sampling group 3 months after surgery. e–h, e1–h1 Sampling group 6 months after surgery. a, e, a1, e1 Normal group. b, f, b1, f1 Control group. c, g, c1, g1 Material group. d, h, d1, h1 MSCs group. C1 Percentage of apoptotic cells in each group at 3 or 6 months. C2 Percentage of proliferative cells in each group at 3 or 6 months. Cells labelled in green represent cells that are proliferating. Asterisk represents the statistical difference between each group and the normal group at 3 months. Hash represents the statistical difference between each group and the normal group at 6 months. *, ^#p < 0.05 or ***, ^###p < 0.001