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. 2016 Aug 27;17(1):372. doi: 10.1186/s12891-016-1209-2

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© The Author(s). 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. 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. 1 — Anticipatory and laser-evoked potentials derived from the EEG signal, averaged across all participants with knee OA and testing sessions. Three auditory tones presented once per second counted down the onset of the laser stimulus