Funding for this research was provided by:
Chinese Stomatological Association oral diseases and systematic diseases special fund (CSA-Z2015-06)
Article History
Received: 1 April 2020
Revised: 16 June 2020
Accepted: 9 July 2020
First Online: 27 July 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethics Committee of Xuanwu Hospital, Capital Medical University (No. Clinical-Research-Review [2016]039) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.