Nakamura, Takahiro
Hata, Yuiko
Nagata, Maho
Yokoi, Norihiko
Yamaguchi, Shumpei
Kaku, Taiichi
Kinoshita, Shigeru
Article History
Received: 2 December 2014
Accepted: 7 April 2015
First Online: 21 May 2015
Competing interests
: The authors declare no competing financial interests.