Funding for this research was provided by:
Pig Industry Technology System Innovation Team Project of Henan Province (S2012–06-G03)
Received: 20 August 2020
Accepted: 18 October 2020
First Online: 29 October 2020
Ethics approval and consent to participate
: All animal experiments were approved by the Institutional Animal Care and Use Committee of Henan Agricultural University (permit number: 11-0085).
: Not applicable.
: We certify that there are no conflicts of interest with any financial organization regarding the materials discussed in the manuscript.