Funding for this research was provided by:
National Basic Research Program of China (973 Program) (2015CB150300)
Received: 20 January 2020
Accepted: 20 July 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: The collection and manipulation of sheep blood samples was approved by the Animal Ethics Committee of the Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences. All sampling procedures were handled in accordance with the Animal Ethics Procedures and Guidelines of the People’s Republic of China (Permit No. LVRIAEC-2018-001). The study of clinical specimens was approved by the Ethics Committee of The Second Hospital of Lanzhou University (reference 2018A-046). All the procedures conducted were according to the Ethical Procedures and Guidelines of the People’s Republic of China.
: Not applicable.
: The authors declare that they have no competing interests.