Funding for this research was provided by:
the Scientific Funding for Youth Elites, School and Hospital of Stomatology, Fujian Medical University, China (2015-KQYY-BJ-1)
the Scientific Funding for Youth Elites, Fujian Province, China, (2014)
Received: 26 April 2019
Accepted: 28 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the School of Stomatology, Fujian Medical University, China (No. 2017-JXGG-01). Ethical approval included a process of written consent to participate and participant written consent to use data to inform publications.
: Not applicable.
: The authors declare that they have no competing interests.