Funding for this research was provided by:
Science and Technology Plan of Liaoning Province (2013225090)
Article History
Received: 5 August 2019
Accepted: 18 June 2020
First Online: 3 August 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All participants signed written informed consents. The current study was conducted under the approval of the Ethics Committee of School and Hospital of Stomatology, China Medical University and carried out in accordance with the Helsinki declaration.