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. 2019 Jul 30;15:1744806919866529. doi: 10.1177/1744806919866529

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© The Author(s) 2019

Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 4. — Effects of EA on the levels of SP and CGRP in the L4–L5 spinal cord of formalin-treated rats as determined by ELISA. Compared with control group, the levels of SP and CGRP were dramatically increased in model group. Pre-EA and post-EA effectively inhibited the increased levels of SP and CGRP induced by formalin injection, and pre-EA treatment significantly reduced the level of SP as compared to post-EA. Data were expressed as Mean ± SD. ^#P<0.05 compared with control group; *P<0.05 compared with model group; ^&P<0.05 compared with post-EA group. EA: electroacupuncture; SP: substance P; CGRP: calcitonin gene-regulated peptide.