Received: 24 June 2020
Accepted: 16 December 2020
First Online: 18 February 2021
Ethics approval and consent to participate
: Experimental animals were authorized by the Science Research Department (in charge of animal welfare issues) of the Institute of Animal Science, Chinese Academy of Agricultural Sciences (IAS-CAAS). The study complies with current laws of the country in which the experiments were performed.
: Not applicable.
: All authors declare no conflicts of interest.