Funding for this research was provided by:
National Natural Science Foundation of China (81670963)
School of Stomatology, Peking University (PKUSS20190101)
Article History
Received: 31 January 2020
Revised: 1 June 2020
Accepted: 16 June 2020
First Online: 1 July 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Animal Care and Use Committee of the Peking University Health Science Center (Approval No. LA2019019).
: Not applicable.
: The authors declare that they have no competing interests.