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. 2017 Jul 19;7:328. doi: 10.3389/fcimb.2017.00328

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Copyright © 2017 Cui, Qu, Guo, Cao, Wu, Mei, Sun, Lu, Qin, Jiao and Liao.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Phylogenetic analysis of PB2. PB2: nt 28–230. Except our isolate, other virus sequences were downloaded from GenBank. QH, Qinghai; VN, Vietnam; IDN, Indonesia; GY, Guiyang; MG, Mongolia; GX, Guangxi; HD, Huadong; SX, Shanxi.