Article History
Received: 20 November 2020
Accepted: 26 April 2021
First Online: 4 May 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: Ethics approvals for the study protocol and analysis of the data were obtained from the institutional review board of Kangbuk Samsung Hospital.
: Informed consent was not required because we only assessed retrospective data without personal identifying information.