Funding for this research was provided by:
National Natural Science Foundation of China (31873008)
National Key Research and Development Program of China (2017YFD0501200)
Received: 3 May 2019
Accepted: 5 July 2019
First Online: 12 July 2019
Ethics approval and consent to participate
: The chicks in the study were housed under an approved protocol, and our research was performed in strict accordance with the recommendations of the Guide for the Care and Use of Laboratory Animals, Ministry of Science and Technology, China, which was approved by the Institutional Animal Care and Use Committee of China Agricultural University (approval no.: CAU20180408-3).
: Not applicable.
: The authors declare that they have no competing interests.