1. College of Science, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
2. College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
3. Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
4. Dafeng Street Taiping Community Health Service Center, Chengdu 610504, Sichuan, China