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LI, Pengcheng, Yunfeng LI, Guoqing SHAO, Qinghua YU, and Qian YANG. "Comparison of Immune Responses to Intranasal and Intrapulmonary Vaccinations with the Attenuated Mycoplasma Hyopneumoniae 168 Strain In pigs." J Vet Med Sci 2015.

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