Funding for this research was provided by:
yonsei university college of medicine (6-2018-0171)
Received: 30 June 2021
Accepted: 8 July 2021
First Online: 27 July 2021
: This study was approved by the Institutional Review Board of Yonsei University Health System (approval no. 4-2021-0127), and the approving authority waived the requirement for informed consent because of the use of deidentified patient data.
: Not applicable.
: The authors declare that they have no competing interests.