Funding for this research was provided by:
Fujian province science and technology innovation joint fund project (2017Y9095)
Received: 26 February 2020
Accepted: 10 August 2020
First Online: 18 August 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of School and Hospital of Stomatology, Fujian Medical University (No. 2017-CX-12). Written informed consent was obtained from all participants in this study.
: Not applicable.
: The authors have no conflicts of interest relevant to this article.