Article History
Received: 23 March 2021
Accepted: 2 June 2021
First Online: 8 December 2021
Declarations
:
: After obtaining approval from the Institutional Review Board at Seoul National University Bundang Hospital (B-1903/531-107, February 12, 2020), electronic medical records from July 2012 to September 2015 were reviewed. The requirement for informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.