Kamimura, Naofumi
Goto, Takayuki
Takahashi, Kenji
Kasai, Daisuke
Otsuka, Yuichiro
Nakamura, Masaya
Katayama, Yoshihiro
Fukuda, Masao
Masai, Eiji
Article History
Received: 21 October 2016
Accepted: 7 February 2017
First Online: 15 March 2017
Competing interests
: The authors declare no competing financial interests.