Yu-Peng Ren, Xiao-Yu Wang, Qi-Gui Yan, Di-Shi Chen, Yu Cheng, Li Wan, Lei Ma, Qi Zhang, Lin Guo, Zhi-Yong Xie and Wan-Zhu Guo
Journal of Animal and Veterinary Advances 11 ( 17 ): 3234 - 3241 , 2012