Nakamura, Kumiko
Shimizu, Takahiro
Yanagita, Toshihiko
Nemoto, Takayuki
Taniuchi, Keisuke
Shimizu, Shogo
Dimitriadis, Fotios
Yawata, Toshio
Higashi, Youichirou
Ueba, Tetsuya
Saito, Motoaki
Article History
Received: 2 September 2014
Accepted: 11 November 2014
First Online: 28 November 2014
Competing interests
: The authors declare no competing financial interests.