Chida, Ryuji
Hisauchi, Itaru
Toyoda, Shigeru
Kikuchi, Migaku
Komatsu, Takaaki
Hori, Yuichi
Nakahara, Shiro
Sakai, Yoshihiko
Inoue, Teruo
Taguchi, Isao
Article History
Received: 4 March 2015
Revised: 13 April 2015
Accepted: 1 May 2015
First Online: 16 July 2015
Competing interests
: The authors declare no conflict of interest.