Funding for this research was provided by:
Yonsei University College of Dentistry (2020-32-0014)
Received: 17 November 2020
Accepted: 1 December 2020
First Online: 9 December 2020
Ethics approval and consent to participate
: This study was reviewed and approved by the Institutional Review Board of Yonsei University College of Dentistry (approval number 2-2018-0036).
: Written informed consent has been obtained from the patients for publication.
: The authors declare that they have no competing interests.