1. Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou 730050, China
2. Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou 730050, China
3. Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
4. Shenniu Pharmaceutical Co., Ltd., Dezhou 253034, China
5. College of Veterinary Medicine, Northwest A & F University, Yangling 712100, China