Funding for this research was provided by:
Seoul National University College of Medicine Research Fund
Received: 5 May 2020
Accepted: 8 September 2020
First Online: 23 September 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Seoul National University Hospital (IRB No. H-1705-120-855) and conducted in conformity with the Declaration of Helsinki. Administrative permissions to access the raw data were acquired by the corresponding author (JKR). Because of the retrospective nature of this study, the IRB waived the requirement for informed consent.
: Not applicable.