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Authors
Yamashita, Shuji
Hayashi, Daisuke
Nakano, Aoi
Hayashi, Yujiro
Hirama, Masahiro
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Article History
Received: 17 February 2015
Revised: 21 March 2015
Accepted: 2 April 2015
First Online: 9 September 2015
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.
