1. College of Veterinary Medicine, Key Laboratory of Animal Diseases and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
2. Veterinary Biologicals Engineering and Technology Research Center of Sichuan Province, Animtech Bioengineering Co. Ltd., Chengdu 610066, China
3. Livestock and Poultry Biological Products Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, China
4. Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu, China