1. State Key Laboratory of Animal Nutrition, Ministry of Agriculture Feed Industry Centre, China Agricultural University, Beijing 100193, China
2. Animal Nutrition Institute, Sichuan Agricultural University, No. 211, Gongpinghuimin Road, Wenjiang District, Chengdu 611130, China
3. Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China