Kim, Jung-Eun
Hwang, Kyoung-Jin
Kim, Sung-Wan
Liu, Stanley Yung-Chuan
Kim, Su-Jung https://orcid.org/0000-0001-8500-5246
Article History
Received: 5 April 2021
Revised: 28 May 2021
Accepted: 21 June 2021
First Online: 28 June 2021
Declarations
:
: All procedures performed in this study were in accordance with the ethical standards of the Institutional Review Board of Kyung Hee University Dental Hospital (KH-DT20005) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: This was a retrospective study based on records; formal consent was not required.
: The authors declare no competing interests.