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Authors
Kim, Jin Joo
Hwang, In Cheol https://orcid.org/0000-0003-4677-5525
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Article History
Received: 17 May 2020
Accepted: 6 October 2020
First Online: 12 October 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: Individuals were informed that they had been selected to participate in the Korea National Health and Nutrition Examination Survey (KNHANES) and could refuse to participate in accordance with the National Health Enhancement Act. All participants provided written informed consent, and researchers followed the guidelines set forth in the Declaration of Helsinki. The Institutional Review Board (IRB) of the Korea Centers for Disease Control and Prevention approved the KNHANES, and the IRB of Gachon University Gil Medical Center approved our study protocol (IRB no., GCIRB2020–028).
