1. College of Veterinary Medicine, Xinjiang Agricultural University, Urmuqi, China.
2. Key Laboratory of Development and Evaluation of the Chemical and Herbal Drugs for Animal Use, College of Veterinary Medicine, National Center for Veterinary Drug Safety Evaluation, China Agricultural University, Beijing, China.
3. Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa.