1. College of Animal Science, South China Agricultural University/Guangdong Provincial Key Laboratory of Animal Nutrition Control/National Engineering Research Center for Breeding Swine Industry, Guangzhou, Guangdong 510642, People’s Republic of China
2. Guangzhou United Bio-Technology Feed Company, Limited, Guangzhou, Guangdong 510545, People’s Republic of China
3. Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, United States