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. 2014 Jan 24;14:16. doi: 10.1186/1471-2148-14-16

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Copyright © 2014 Lu et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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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Bayesian maximum clade credibility phylogenies for the internal segments encoding PB2 and NS. A: PB2 phylogeny, colored by HA subtype. B: PB2 phylogeny colored by NA subtype. C: PB2 phylogeny colored by combined HA-NA subtype. D: NS phylogeny colored by combined HA-NA subtype. Branches are colored according to the different subtypes of their descendent nodes (C and D share the same key). The full tree with all taxon names is given in Additional file 1: Figure S2.