Ruiping Ma, Quantai Xing, Lihua Shao, Dakun Wang, Qingzhi Hao, Xia Li, Lintao Sai and Lixian Ma*
* Corresponding author: Lixian Ma shandongqilu@gmail.com
Virology Journal 2012, 9:87 doi:10.1186/1743-422X-9-87
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