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Asian Journal of Animal and Veterinary Advances 6 ( 6 ): 627 - 635 , 2011
Yu Shi-Gang, Li Hai-Ying, Fang Chao, Qin Chong-Kai and Liu Wu-Jun
Journal of Animal and Veterinary Advances 9 ( 20 ): 2659 - 2664 , 2010