Funding for this research was provided by:
Ningxia Key R&D Project (2019BBF02027)
Hebei Key R&D Project (19226607D)
National Natural Science Foundation of China (31572587)
High-end Foreign Experts Recruitment Program (GDT20171100013)
Received: 30 August 2021
Accepted: 9 November 2021
First Online: 11 December 2021
: This work has received approval for research ethics from Ethical Committee of the College of Veterinary Medicine, China Agricultural University (CAU), Beijing and the study was conducted according to standard ethical guidelines implemented at CAU (SYXK, 2016-0008).
: The authors declare that they have no competing interests.