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. 2019 Apr 22;20:174. doi: 10.1186/s12891-019-2527-y

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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. 3 — Response rates at the end of the extension phase. The response rates were based on the change from baseline of the placebo-controlled phase to endpoint (last observation carried forward) in Brief Pain Inventory average pain rating. Abbreviations: DLX = duloxetine; PLA = placebo