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Authors
Yoshii, Ichiro https://orcid.org/0000-0002-9123-4624
Chijiwa, Tatsumi
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Article History
First Online: 25 May 2020
Compliance with ethical standards
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: Ichiro Yoshii and Tatsumi Chijiwa declare they have no conflicts of interest.
: Not applicable.
: This study was approved by our Ethics Committee (approval number: Y-RA-2019-7) in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. In addition, anonymity was ensured for all patients and their families who participated in this study, and no identifying characteristics were issued that could help identify these individuals. Moreover, all patients were informed of the purpose and possible consequences of this study, including that this was a retrospective study in clinical practice without any experimentation on subjects.
: Not applicable.
