1. Key Laboratory of Animal Disease-Resistance Nutrition and Feed Science, Ministry of Agriculture, P. R. China, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
2. State Key Laboratory of Livestock and Poultry Breeding; Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture; Guangdong Public Laboratory of Animal Breeding and Nutrition; Guangdong Key Laboratory of Animal Breeding and Nutrition; Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China
3. School of Life Science and Engineering, Foshan University, Foshan 528231, China