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. 2014 Dec 31;14:698. doi: 10.1186/s12879-014-0698-6

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© Ding et al.; licensee BioMed Central. 2014

This article is published under license to BioMed Central Ltd. 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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Phylogenetic analysis of HA and NA segments from the four H7N9 positive samples among three confirmed cases. A: HA; B: NA. Notation: Red color strains noted the isolates from three family cluster cases, 2014 while the blue color noted the isolates from the two sporadic confirmed cases in Zhejiang province, in 2013. A/Anhui/1/2013 was H7N9 vaccine candidate isolate in this 8 segments.