Pingsen Zhao, Lili Zhao, Kun Zhang, Hao Feng, Hualei Wang, Tiecheng Wang, Tao Xu, Na Feng, Chengyu Wang, Yuwei Gao, Geng Huang, Chuan Qin, Songtao Yang* and Xianzhu Xia*
* Corresponding authors: Songtao Yang yst10223@yahoo.com.cn - Xianzhu Xia xiaxianzhu@gmail.com
Virology Journal 2012, 9:159 doi:10.1186/1743-422X-9-159