Funding for this research was provided by:
National Natural Science Foundation of China (31772408)
Received: 20 February 2020
Accepted: 30 June 2020
First Online: 25 July 2020
Ethics approval and consent to participate
: All animal handling and procedures were performed in accordance with the Institute of Animal Sciences of Chinese Academy of Agricultural Sciences (CAAS) Institutional Animal Care and Use Committee (IACUC).
: Not applicable.
: The authors declare no competing interests.