Wakayama, Toshitaka
Higashiguchi, Takeshi
Oikawa, Hiroki
Sakaue, Kazuyuki
Washio, Masakazu
Yonemura, Motoki
Yoshizawa, Toru
Tyo, J. Scott
Otani, Yukitoshi
Article History
Received: 24 November 2014
Accepted: 25 February 2015
First Online: 24 March 2015
Competing interests
: The authors declare no competing financial interests.