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Authors
Kuwatani, Tatsu
Nagata, Kenji
Okada, Masato
Watanabe, Takahiro
Ogawa, Yasumasa
Komai, Takeshi
Tsuchiya, Noriyoshi
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Article History
Received: 7 July 2014
Accepted: 30 October 2014
First Online: 17 November 2014
Competing interests
: The authors declare no competing financial interests.
