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. 2015 Dec 22;34:44. doi: 10.1186/s40101-015-0082-2

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© Ikei 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. 4 — The 30-s averages and overall mean oxy-Hb concentrations in the left prefrontal cortex during olfactory stimulation by Hinoki cypress leaf oil or control. a Changes in each 30-s average oxy-Hb concentration over 90 s. b Overall mean oxy-Hb concentration. Data are expressed as the mean ± standard error, n = 12, determined by the paired t test (one-sided)