Funding for this research was provided by:
Basic Science Research Program through the National Research Foundation of Korea (2017R1D1A1B03030440)
Basic Science Research Program through the National Research Foundation of Korea (2020R1A2C1003886)
Received: 17 March 2020
Revised: 14 June 2020
Accepted: 20 July 2020
First Online: 1 August 2020
Compliance with ethical standards
: The scientific guarantor of this publication is Sung Soo Ahn.
: 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. Kyunghwa Han, Ph.D., from the Department of Radiology and Research Institute of Radiological Science, Yonsei University College of Medicine, has significant statistical expertise and one of the authors.
: 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