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. 2014 Apr 6;16(2):R35. doi: 10.1186/bcr3639

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Copyright © 2014 Laurinavicius et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Orthogonal linear regression analysis. Reference values as explanatory variable and the DIA-2 as dependent variable (yellow) taking into account an ellipse of 95% confidence interval (orange) defined the sampling theory (n = 164 n = 164, P <0.0001, equation of the line: y = 0.877x + 0.012). DIA, digital image analysis.