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Article History

Received: 16 September 2020

Accepted: 30 June 2021

First Online: 9 July 2021

Declarations

:

: 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. This retrospective study was approved by the Institutional Review Board (IRB) of the Hanyang University Hospital, Seoul, Republic of Korea, and all research conducted adhered to the tenets of the Declaration of Helsinki (IRB No. 2018-09-019).

: Not applicable.

: The authors declare no competing interests.