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Authors
Shimojima, Keiko
Yamamoto, Toshiyuki https://orcid.org/0000-0002-9484-3505
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Article History
Received: 2 November 2016
Revised: 10 July 2017
Accepted: 10 July 2017
First Online: 14 September 2017
Competing interests
: The authors declare no conflict of interest.
