Choi, Yoonhyung
Lee, Duk Hee
Lee, Jung Il
Article History
Received: 16 April 2021
Accepted: 24 September 2021
First Online: 26 October 2021
Declarations
:
: This study was approved by the institutional review board (IRB) of Ewha Womans’ University Mok-dong Hospital (IRB No. 2020–12-007) and was approved by the ethical principles of the Declaration of Helsinki<b>.</b> All methods were performed in accordance with the relevant guidelines and regulations. Informed consent was waived by the IRB because of the retrospective nature of the study; and patient information was anonymised before the analysis.
: NA
: The authors declare that they have no competing interests.