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Authors
Otsuka, Mitsuya
Hayashi, Atsushi
Tojo, Naoki
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Article History
Received: 29 November 2019
Accepted: 10 April 2020
First Online: 20 April 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
