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Authors
Ichikawa, Shintaro https://orcid.org/0000-0001-8043-8472
Isoda, Hiroyoshi
Shimizu, Tatsuya
Tamada, Daiki
Taura, Kojiro
Togashi, Kaori
Onishi, Hiroshi
Motosugi, Utaroh
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Article History
Received: 11 March 2020
Revised: 7 April 2020
Accepted: 20 May 2020
First Online: 4 June 2020
Compliance with ethical standards
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: The scientific guarantor of this publication is Utaroh Motosugi.
: 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 (Daiki Tamada in University of Yamanashi) has significant statistical expertise.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • retrospective• cross sectional study• multicenter study
