1. Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Yaan 625014, China.
2. Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
3. School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China.
4. Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Yaan 625014, China.
5. College of Life Science, Sichuan Agricultural University, Yaan 625014, China.