Fukuda, Atsushi
Tomikawa, Junko
Miura, Takumi
Hata, Kenichiro
Nakabayashi, Kazuhiko
Eggan, Kevin
Akutsu, Hidenori
Umezawa, Akihiro
Article History
Received: 24 January 2014
Accepted: 2 October 2014
First Online: 14 November 2014
Competing interests
: The authors declare no competing financial interests.