Received: 13 July 2020
Accepted: 22 March 2021
First Online: 31 March 2021
: This study was approved by the Institutional Review Board of the Uijeongbu St. Mary Hospital, College of Medicine, Catholic University of Korea [UC18ZESI0145], and it conforms to the provisions of the Helsinki Declaration, as revised in 2013 (available at: ExternalRef removed). The need for informed consent was waived because of the retrospective nature of the study.
: Not applicable.
: The authors have no conflicts of interest to declare.