Shu-Shan Zhao, Lan-Hua Tang, Xia-Hong Dai, Wei Wang, Rong-Rong Zhou, Li-Zhang Chen* and Xue-Gong Fan*
* Corresponding authors: Li-Zhang Chen clzhang2008@yahoo.cn - Xue-Gong Fan xgfan@hotmail.com
Virology Journal 2011, 8:111 doi:10.1186/1743-422X-8-111