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Authors
Kanbayashi, Takamichi https://orcid.org/0000-0002-6948-6040
Sonoo, Masahiro
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Article History
Received: 25 March 2021
Accepted: 21 May 2021
First Online: 31 May 2021
Declarations
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: This study approved by the ethics committee of Teikyo University (Approval No. 19–220). This was a retrospective study, the committee approved the distribution of a statement of disclosure of research information instead of informed consent from patients.
: Not applicable.
: The authors declare that they have no competing interests.
