Article History
Received: 1 December 2018
Revised: 22 February 2019
Accepted: 11 March 2019
First Online: 26 March 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Byungjun Kim.
: 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.
: One of the authors has significant statistical expertise.
: 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