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Authors
Aoki, Makoto https://orcid.org/0000-0001-8239-8822
Abe, Toshikazu
Hagiwara, Shuichi
Saitoh, Daizoh
Oshima, Kiyohiro
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Article History
Received: 14 November 2019
Accepted: 24 June 2020
First Online: 30 June 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Institutional Review Board of Gunma University Hospital. Given the retrospective and anonymized nature of this study, the Ethics Committees waived the need for informed consent from the study participants.
: Not applicable.
: The authors declare that they have no competing interests.
