Different Origins of Newcastle Disease Virus Hemagglutinin-Neuraminidase Protein Modulate the Replication Efficiency and Pathogenicity of the Virus oleh Ji-hui Jin, Jin-long Cheng, Zi-rong He, Ying-chao Ren, Xiao-hui Yu, Yang Song, Hui-ming Yang, Yan-ling Yang, Tong Liu, Guo-zhong Zhang, Guo-zhong Zhang