Funding for this research was provided by:
Jiangsu Agricultural Science and Technology Independent Innovation Fund (CX(19)3026)
Received: 17 November 2020
Accepted: 21 January 2021
First Online: 27 February 2021
Ethics approval and consent to participate
: All animal experiments complied with the institutional animal care guidelines and the protocol (SYXY-19), which was approved by the Animal Care Committee of Yangzhou University. At the end of the experiment, all the chickens were euthanized by CO<sub>2</sub>.
: The authors declare that they have no competing interests.