Jang, Jieun
Kim, Youngsook
Shin, Jaeyong
Lee, Sang Ah
Choi, Young
Park, Eun-Cheol http://orcid.org/0000-0002-2306-5398
Article History
Received: 11 September 2017
Accepted: 3 May 2018
First Online: 21 May 2018
Ethics approval and consent to participate
: The Institutional Review Board (IRB) of the Korea Centers for Disease Control and Prevention (KCDC) provided formal ethics approval for the KNHANES data sets (IRB approval number 2013-07CON-03-4C for 2013, 2013-12EXP-03-5C for 2014, 2015–01-02-6C for 2015).
: The authors declare that they have no competing interests.
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