Iikuni, Shimpei
Ono, Masahiro
Watanabe, Hiroyuki
Matsumura, Kenji
Yoshimura, Masashi
Kimura, Hiroyuki
Ishibashi-Ueda, Hatsue
Okamoto, Yoko
Ihara, Masafumi
Saji, Hideo
Article History
Received: 25 June 2015
Accepted: 26 April 2016
First Online: 16 May 2016
Competing interests
: The authors declare no competing financial interests.