1. Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, 211 Huimin Road, No. 6 Teaching Building, Room 604, Wenjiang District, Chengdu, Sichuan 611130, China
2. College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan 611130, China