1. Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA
2. Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China
3. Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078, USA
4. State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing 100193, China
5. Department of Physiological Sciences, Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK 74078, USA