Funding for this research was provided by:
the National Key Research and Development Program of China (2017YFD0501200)
National Basic Research Program of China (2015CB150300)
National Natural Science Foundation of China (31872464)
Priority Academic Program Development of Jiangsu Higher Education Institutions ((PAPD))
Received: 23 June 2019
Accepted: 24 January 2020
First Online: 3 February 2020
Ethics approval and consent to participate
: The study was conducted following the guidelines of the Animal Ethics Committee, Nanjing Agricultural University (NAU), China. All experimental protocols were approved by the Science and Technology Agency of Jiangsu Province (Approval ID: SYXK (SU) 2010–0005).
: Not applicable.
: The authors declare that they have no competing interests.