Jeong, Sung Hoon
Hoon Kim, Seung
Lee, Doo Woong
Park, Eun-Cheol
Jang, Suk-Yong
Article History
Received: 28 February 2022
Accepted: 12 May 2022
First Online: 17 May 2022
Declarations
:
: We assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008. As the NHIS-NSC data do not contain any identifying information, the study was approved as exempt by the Institutional Review Board of Yonsei University’s Health System (4–2021–1211). Since we used the de-identified these data, the need for informed consent was waived by the Institutional Review Board of Yonsei University’s Health System (4–2021–1211).
: Not applicable.
: The authors declare that they have no competing interests.