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. 2018 Jul 11;15:106. doi: 10.1186/s12985-018-1018-3

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© The Author(s). 2018

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. 2 — Viral DNA load of equid herpesvirus-2 (EHV-2) and EHV-5 in nasal swab samples collected from horses included in the study (n = 540) stratified by age. The middle line in each box represents median, whiskers represent minimum and maximum values, with means indicated by ‘+’. Significance levels calculated using Kruskal-Wallis test with Dunn’s multiple comparison are indicated by the stars: < 0.05 (*),< 0.001 (***). The number of horses in each category is indicated above each box