Niimi, Hideki
Ueno, Tomohiro
Hayashi, Shirou
Abe, Akihito
Tsurue, Takahiro
Mori, Masashi
Tabata, Homare
Minami, Hiroshi
Goto, Michihiko
Akiyama, Makoto
Yamamoto, Yoshihiro
Saito, Shigeru
Kitajima, Isao
Article History
Received: 21 January 2015
Accepted: 1 July 2015
First Online: 28 July 2015
Competing interests
: The authors declare no competing financial interests.