Text and Data Mining valid from 2018-11-19
Received: 13 March 2018
Revised: 20 September 2018
Accepted: 12 October 2018
First Online: 19 November 2018
Compliance with ethical standards
: The scientific guarantor of this publication is Joon Koo Han, M.D.
: 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.
: Su Joa Ahn, MD, has significant statistical expertise and 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 (IRB No. 1706–128-861).
: • Retrospective• Diagnostic or prognostic study• Performed at one institution