Text and Data Mining valid from 2019-07-15
Received: 26 July 2018
Accepted: 1 July 2019
First Online: 15 July 2019
Ethics approval and consent to participate
: This study used data from the fourth (2007–2009) and fifth (2010, 2012) KNHANES conducted by the Korea Centers for Disease Control and Prevention, with exemption from review (HYI-16-195) by the Institutional Review Board (IRB) at Hanyang University.
: Not applicable.
: The authors declare that they have no competing interests.