Received: 14 April 2022
Accepted: 2 August 2022
First Online: 16 August 2022
: Approval of IRB exemption for this study was granted by the Yonsei University Institutional Review Board (approval number: 1041849–202108-SB-127-01) given the retrospective nature of the study. This study was carried out in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. We received a waiver of informed consent because the data were obtained from a public database and analyzed in de-identified samples. We used reliable raw data from the Korea Health Panel Study (ExternalRef removed), available on the condition of granted permission from the Korea Institute for Health and Social Affairs.
: Not applicable.
: The authors declare no potential conflicts of interest with respect to the research, authorship, and publication of this article.