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. 2018 Dec 20;20:86. doi: 10.1186/s12968-018-0499-y

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© The Author(s). 2018

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. 9 — Association between PWV and age in vivo. PWV of healthy subjects plotted against age (a). The older cohort (red) has a significant higher PWV than the younger cohort (blue). b shows boxplot between the two groups. Error bars indicate one standard deviation resulting from calculating PWV with the 5 different methods