Received: 17 December 2019
Accepted: 12 March 2020
First Online: 4 May 2020
Ethics approval and consent to participate
: Studies were carried out in accordance with the Chinese Guidelines for Animal Welfare and Experimental Protocol, and received prior approval by the Animal Care and Use Committee of China Agricultural University (ID: SKLABB-2010-003).
: Not applicable.
: The authors declare that they have no competing interests.