Received: 23 July 2020
Accepted: 24 November 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: Data were anonymized prior to obtaining from KNHANES. All participants in the survey signed an informed consent form. The Institutional Review Board (IRB) of the Gil Medical Center, Gachon University, approved this study (IRB number: GCIRB2020–147).
: Not applicable.
: The authors declare that they have no competing interests.