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Authors
Muraoka, Hirotaka https://orcid.org/0000-0001-5764-2002
Kaneda, Takashi
Ito, Kotaro
Hirahara, Naohisa
Ichiki, Shungo
Kondo, Takumi
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Article History
Received: 5 January 2022
Accepted: 24 January 2022
First Online: 14 February 2022
Declarations
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: The authors declare that they have no conflict of interest.
: We designed and conducted a retrospective cohort study, which was approved by Nihon University Ethics Committee (EC19-011).
: The requirement to obtain written informed consent was waived for this retrospective study. All procedures followed the guidelines of the Declaration of Helsinki, Ethical Principles for Medical Research Involving Human Subjects.
: This article does not contain any studies with animal subjects performed by the any of the authors.
