Funding for this research was provided by:
National Research Foundation of Korea (NRF-2015M3A9B6027139)
Text and Data Mining valid from 2019-03-22
Received: 17 October 2018
Accepted: 15 March 2019
First Online: 22 March 2019
Ethics approval and consent to participate
: The fifth Korea National Health and Nutrition Examination Survey (KNHANES V-1) was approved by the Korea Ministry of Health and Welfare (2010-02CON-21-C). The Institutional Review Boards of Konkuk University and the Korea Institute of Oriental Medicine also approved the access and analysis of open source data from the KNHANES in the present study with a waiver of documentation of informed consent (IRB No. 7001355–201,802-E-063 and I-1805/003–001).All procedures in studies involving human participants were performed in accordance with the ethical standards of the institutional and/or national research committee and the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.
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