1. Key Laboratory of Animal Disease Resistance Nutrition of the Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Yaan, Sichuan 625014, China
2. Test Center for Feed Quality Supervision and Inspection (Chengdu) of the Ministry of Agriculture, Chengdu, Sichuan, China
3. Feed Safety Reference Laboratory of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China