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Authors
Youn, Hin Moi
Lee, Hyeon Ji
Lee, Doo Woong
Park, Eun-Cheol
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Article History
Received: 2 January 2020
Accepted: 17 March 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The KLoSA study was approved by the National Statistical Office (Approval number: 33602) and was conducted after acquiring verbal consent of participants in the study. Because the KLoSA database has been released to the public for scientific use, ethical approval was not required for the study.
: There are no details of individual participants in the manuscript.
: The authors declare that they have no competing interests.
