Funding for this research was provided by:
Program for New Clinical Techniques and Therapies of Peking University School and Hospital of Stomatology (PKUSSNCT-16A07)
Program of Peking University School and Hospital of Stomatology (PKUSS20170103)
Article History
Received: 26 February 2020
Accepted: 25 June 2020
First Online: 8 July 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.