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. 2016 May 6;17:49. doi: 10.1186/s10194-016-0631-z

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© Li et al. 2016

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.

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Fig. 2 — Pre-administration of VPA reduced the expression of CGRP in jugular blood and the expression of c-Fos in trigeminal nucleus caudalis. a quantitative analysis results of expression of CGRP in different groups. “a”, significantly different from control group, P < 0.05; “b”, significantly different from VPAH group, P < 0.05; “c”, significantly different from NTG group, P < 0.05. b representative images of immunohistochemical staining of c-Fos in different groups, c-Fos positive neurons were stained brown