Funding for this research was provided by:
Korea Centers for Disease Control and Prevention (2019E280500, 2020E280700, 2021-10-026)
Received: 10 December 2022
Accepted: 9 April 2023
First Online: 21 April 2023
: This study was performed in line with the principles of the Declaration of Helsinki. The study was approved by the institutional review boards of all participating hospitals, including Seoul National University Hospital (approval number: IRB-H-1808-135-967). As this was an observational study, the decision to obtain or waive written informed consent was left to the discretion of the institutional review boards of the participating hospitals.
: Not applicable.
: The authors declare that they have no competing interests.