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Weifeng Shi*, Xiang Li, Xueling Hou, Hongjun Peng, Qingbo Jiang, Mei Shi, Yun Ji, Xiping Liu and Jinbo Liu
* Corresponding author: Weifeng Shi shiweifeng67@163.com
BMC Infectious Diseases 2012, 12:327 doi:10.1186/1471-2334-12-327
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