Funding for this research was provided by:
National Research Foundation of Korea (NRF-2017R1A2B4006020)
Article History
Received: 8 February 2019
Revised: 15 March 2019
Accepted: 25 March 2019
First Online: 23 April 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Chan Kyo 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.
: Insuk Sohn, PhD, of Statistics and Data Center, Samsung Medical Center, kindly provided statistical advice for this manuscript.
: This retrospective study was approved by our institutional review board, with a waiver of the requirement for informed consent.
: Institutional Review Board approval was obtained.
: • Retrospective• Diagnostic or prognostic study• Performed at one institution