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. 2019 Mar 7;10:79. doi: 10.1186/s13287-019-1175-3

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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. 7 — The effect of fractionated serum on MSC proliferation. PL-MSCs (a, c) and UC-MSCs (b, d) were cultured in DMEM+ 5% serum supplemented with < 3 kDa, 3–10 kDa, 10–30 kDa, 30–100 kDa, or > 100 kDa fractions. The unfractionated serum (10% serum) served as a positive control while 5% serum served as a negative control. Data are presented as mean ± SEM from three independent experiments. *p < 0.05 compared to 10% serum