1 College of Animal Science and Technology, Hunan Agriculture University, Changsha, China.
2 State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangdong, China.
3 Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China.
4 Department of Medicine, University of Kentucky Medical Center, Lexington, KY, United States.