Text and Data Mining valid from 2019-11-21
Received: 6 September 2019
Accepted: 8 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: KNHANES is openly published. Thus, ethical approval was not required for this study. This study did not require informed consent from the participants, as their information was fully anonymized and unidentified prior to analysis. KNHANES data was approved by the Institutional Review Board of the Korean Centers for Disease Control and Prevention (IRB No. 2010-02CON-21-C, 2011-02CON-06-C, 2012-01EXP-01-2C, 2013-07CON-03-4C, 2013-12EXP-03-5C).
: Not applicable.
: The authors report no conflicts of interest in this work.