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. 2015 Dec 1;14:86. doi: 10.1186/s40200-015-0217-3

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© Taheri et al. 2015

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. 2 — Pain intensity alterations, measured twice weekly (numbers in parentheses) during both phases of the study. At the end of the forth week the drug treatment were switched between the two groups