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. 2017 Oct 27;7:14231. doi: 10.1038/s41598-017-14577-5

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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GABA+/tCr levels in visual cortex and in DLPFC. (A) GABA+/tCr levels in visual cortex were increased in older adults (filled) compared to younger adults (unfilled). (B) Both older (filled) and younger (unfilled) adults had similar amounts GABA+/tCr in DLPFC. Error bars represent 95% confidence intervals of the mean. Bonferroni correction would result in a p-value of 0.025 being considered for statistical significance.