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. 2020 Aug 3;10:13024. doi: 10.1038/s41598-020-69692-7

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Phylogenetic tree reconstruction of GT1a strains circulating in Spain. A maximum likelihood tree (ML) produced under the GTR + Gamma substitution model with 1,000 bootstrap replicates segregates the GT1a into two clades, clade I (blue) and clade II (red). Bootstrap supports ≥ 70% are depicted as purple filled circles at the nodes and transmission clusters (TC ≥ 2) are highlighted in grey colour.