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. 2017 Dec 13;8:279. doi: 10.1186/s13287-017-0729-5

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© The Author(s). 2017

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. 6 — a Representative semi-thin cross-sections of the sural nerves of rats. Toluidine blue stained. b The morphometry of the myelinated nerve fibers. There were no significant differences in the diameter and circularity between the normal and diabetic rats. Myelin thickness was less in the diabetic rats compared with the normal rats. The transplantation of dental pulp stem cells (DPSCs) significantly increased the myelin thickness and circularity. The results are means ± SEM. **P < 0.01, vs. vehicle-injected side of normal rats; ^† P < 0.05, ^†† P < 0.01, vs. vehicle-injected side of diabetic rats; n = 5