1. State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China;
2. Swine Nutrition and Production, West Central Research and Outreach Center, University of Minnesota, Morris, MN, USA;
3. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, China;
4. College of Animal Science and Technology, Shihezi University, Shihezi, Xinjiang, China;
5. Department of Internal Medicine Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA