1 Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China.
2 School of Science, Technology, Engineering, and Mathematics, Kentucky State University, Frankfort, KY, USA.
3 Jiangsu Engineering Laboratory of Animal Immunology, Institute of Immunology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China. Electronic address: shuosu@njau.edu.cn.