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. 2017 Oct 31;18:837. doi: 10.1186/s12864-017-4174-8

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© The Author(s). 2017

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 — General appearance of sweet orange co-infected with CTV-B2/CaLas-B232 or CTV-B6/CaLas-B232. Pictures were taken 16 months after inoculation with CaLas and 13 months after inoculation with CTV. a, Trees co-infected with CTV-B2 and CaLas-B232; b, Trees co-infected with CTV-B6 and CaLas-B232; 1 and 2, Most and least severe symptom expression for each treatment; 3, Self-inoculated healthy control