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Article History
Received: 3 January 2019
Revised: 24 May 2019
Accepted: 12 June 2019
First Online: 28 June 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Joon Koo Han, M.D.
: The authors declare that they have no competing interests.
: Seo-Youn, Choi, M.D., 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. 1702-010-829).
: • Retrospective• Diagnostic or prognostic study• Performed at one institution
