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Authors
Song, Youngshin http://orcid.org/0000-0002-2203-5840
Kwon, Myoungjin http://orcid.org/0000-0003-2364-0863
Kim, Sun Ae http://orcid.org/0000-0002-6896-7459
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Article History
Received: 3 November 2019
Accepted: 16 February 2020
First Online: 2 March 2020
Ethics approval and consent to participate
: The KNHANES 6th–7th were managed by the Korea Center for Disease Control and Prevention (KCDC) and approved by the KCDC Institutional Review Board (6th 2014: 2013-12EXP-03-5C and according to the Bioethics Law). All participants voluntarily participated and provided written informed consent prior to participating in the study.
: Not applicable.
: The authors declare that they have no competing interests.
