Funding for this research was provided by:
National Natural Science Foundation of China (81372043)
Beijing Natural Science Foundation (7162199)
National Science and Technology Major Project (2018ZX10101004)
Article History
Received: 26 October 2019
Accepted: 21 May 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: Ethical approval was received from the Biomedical Ethics Committee of Peking University Hospital of Stomatology (Number: PKUSSIRB-201735060) in January 26, 2018. Written informed consent was obtained from all participating patients or their next of kin or legal representative who must understand the recruiter’s description of the trial.
: Not applicable.
: The authors declare that they have no competing interests.