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. 2020 Jan 28;15:29. doi: 10.1186/s13018-020-1551-9

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© The Author(s). 2020

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. 4 — The apoptosis of hNP-MSCs cultured in normal condition (group 1), hypoxia and nutrition deficiency condition (group 2), the LY294002 condition (group 3), and the IGF-1 condition (group 4) evaluated by flow cytometry. *p < 0.05 indicated significant difference between groups