Funding for this research was provided by:
National Nature Science Foundation of China (11804235)
Support plan for young and middle-aged scientific and technological innovation talents of Shenyang City (RC180226)
Received: 28 November 2019
Accepted: 29 June 2020
First Online: 3 July 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Animal Welfare and Ethics Committee of Peking University (NO. IRBLA2009–020).
: Not applicable.
: The authors declare that they have no competing interests.