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Article History

Received: 17 March 2020

Revised: 20 August 2020

Accepted: 17 November 2020

First Online: 27 November 2020

Compliance with ethical standards

:

: The scientific guarantor of this publication is Sunghoon Park.

: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.

: No complex statistical methods were necessary for this paper.

: Written informed consent was waived by the Institutional Review Board.

: Institutional Review Board approval was obtained.

: • retrospective• diagnostic or prognostic study• performed at one institution