Hata, Ryu-Ichiro
Izukuri, Kazuhito
Kato, Yasumasa
Sasaki, Soichiro
Mukaida, Naofumi
Maehata, Yojiro
Miyamoto, Chihiro
Akasaka, Tetsu
Yang, Xiaoyan
Nagashima, Yoji
Takeda, Kazuyoshi
Kiyono, Tohru
Taniguchi, Masaru
Article History
Received: 12 June 2014
Accepted: 12 February 2015
First Online: 13 March 2015
Competing interests
: The authors declare no competing financial interests.