1. College of Animal Science, South China Agricultural University, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Guangzhou, China
2. State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
3. Department of Animal Science, Division of Agriculture, University of Arkansas, Fayetteville, AR, USA