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Authors
Eki, Toshihiko https://orcid.org/0000-0003-1553-8279
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Funding
Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (24108005)
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Article History
Received: 24 November 2017
Revised: 12 January 2018
Accepted: 14 January 2018
First Online: 8 February 2018
Compliance with ethical standards
:
: The author declares that there is no conflict of interest.
: This article does not describe any studies with human participants or with animals that were performed by the author.
