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Article History

Received: 10 December 2021

Accepted: 16 June 2022

First Online: 27 June 2022

Declarations

:

: The KNHANES is reviewed and approved by the Research Ethics Review Board of the Korea Centers for Disease Control and Prevention (KCDC) annually. This study was conducted in accordance with ethical standards, as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. All surveys were conducted after obtaining informed consent from the participants.

: Not applicable.

: The authors declare no competing interests