Wei Cui, Hongwen Zhao, Xu Lu, Ying Wen, Ying Zhou, Baocheng Deng, Yu Wang, Wen Wang, Jian Kang and Pei Liu*
* Corresponding author: Pei Liu syliupei2003@yahoo.com.cn
BMC Infectious Diseases 2010, 10:145 doi:10.1186/1471-2334-10-145