Miyagishima, Shin-ya
Fujiwara, Takayuki
Sumiya, Nobuko
Hirooka, Shunsuke
Nakano, Akihiko
Kabeya, Yukihiro
Nakamura, Mami
Article History
Received: 16 December 2013
Accepted: 4 April 2014
First Online: 8 May 2014
Competing interests
: The authors declare no competing financial interests.