Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (JP22790752)
University of Fukui Hospital (Scientific research program "Seeds of Advanced Medicine")
Text and Data Mining valid from 2019-04-10
Received: 26 September 2018
Revised: 28 February 2019
Accepted: 13 March 2019
First Online: 10 April 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Dr. Y. Umeda.
: 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.
: Three of the authors have significant statistical expertise.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • Retrospective• Diagnostic study or prognostic study• Performed at one institution