Received: 3 September 2021
Accepted: 18 April 2022
First Online: 4 May 2022
: The authors declare no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Formal consent was not required for this type of study.
: This study was approved by the Institutional Review Board of Korea University Anam Medical Center (no. 2021AN0151) and conducted in accordance with the principles of the Declaration of Helsinki. Informed consent was waived owing to the retrospective nature of the study.