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. 2015 Aug 14;12:25. doi: 10.1186/s12981-015-0067-6

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© Shete 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 — Comparison of % CV, mean percent variation differences and r² values. % CV (calculated for commercial controls) indicated as closed bars and mean percent variation (for duplicate analysis method) indicated as open bars are plotted on left Y axis for laboratories 1, 2, 3, 5, 6, 7 (plotted on X axis). r² values calculated by regression analysis for duplicate analysis method are indicated as line diagram and are plotted on Z axis. Error bars for each parameter indicate standard error.