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Authors
Okabe, Hiroshi https://orcid.org/0000-0002-1268-4177
Sunagawa, Hideki
Saji, Masashi
Hirai, Kenjiro
Hisamori, Shigeo
Tsunoda, Shigeru
Obama, Kazutaka
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Article History
Received: 20 November 2020
Accepted: 17 December 2020
First Online: 2 January 2021
Compliance with ethical standards
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: Hiroshi Okabe, Hideki Sunagawa, Masashi Saji, Kenjiro Hirai, Shigeo Hisamori, Shigeru Tsunoda, and Kazutaka Obama declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were approved by the Institutional Review Board of each participating hospital and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
