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. 2015 Jun 30;15:249. doi: 10.1186/s12879-015-0961-5

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© Champredon et al. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), 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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Fig. 4 — Funnel plot. The horizontal axis represents the mean posterior effect size for each study (the log10 HIV viral load between HIV positive individuals with and without STI co-infection), the vertical axis is the effect size precision (inverse of the standard deviation) of the associated study. Each point represents a study. The solid vertical line represents the mean effect size and the solid curved lines represent its 95 % CI. The dashed vertical line represents a null effect size (no HIV viral load difference)