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. 2012 Aug 24;2(4):e001636. doi: 10.1136/bmjopen-2012-001636

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© 2012, 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 under the terms of the Creative Commons Attribution Non-commercial License, which permits use, distribution, and reproduction in any medium, provided the original work is properly cited, the use is non commercial and is otherwise in compliance with the license. See: http://creativecommons.org/licenses/by-nc/3.0/ and http://creativecommons.org/licenses/by-nc/3.0/legalcode.

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Bland-Altman plots of the repeatability measurements for one-segment and two-segment³² ³³ measurements. See the text for details. X-axis: absolute mean of the repeated measurements. Y-axis: difference between the repeated measurements. Dashed line: mean difference in the repeated measurements. Solid lines: 95% limits of agreement.