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Authors
Kasagawa, Akito
Usui, Akihito https://orcid.org/0000-0003-1889-7496
Kawasumi, Yusuke
Funayama, Masato
Saito, Haruo
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Article History
Received: 13 November 2020
Revised: 25 March 2021
Accepted: 6 May 2021
First Online: 8 June 2021
Declarations
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: The scientific guarantor of this publication is Akihito Usui.
: 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.
: 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.
: • retrospective• observational• performed at one institution
