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. 2014 May 5;4(5):e005268. doi: 10.1136/bmjopen-2014-005268

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 3.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/3.0/

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Assessment of endothelial function using our proprietary software. The graph describes the changes in the diameter of the radial artery in response to changes in local shear stress. Methods described in detail in refs.^21–25