Received: 1 September 2021
Accepted: 11 November 2021
First Online: 4 December 2021
: The study was performed according to the tenets of the Helsinki Declaration and was approved by the Institutional Review Board of Seoul National University Hospital (H-1904-011-1023). The requirement for informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests relevant to this article. There was no external funding or financial support provided for this study.