Ying Fang, Liurong Fang, Yang Wang, Yingying Lei, Rui Luo, Dang Wang, Huanchun Chen and Shaobo Xiao*
* Corresponding author: Shaobo Xiao vet@mail.hzau.edu.cn
Virology Journal 2012, 9:83 doi:10.1186/1743-422X-9-83