Ogura, Yoji
Fujibayashi, Shunsuke
Iida, Aritoshi
Kou, Ikuyo
Nakajima, Masahiro
Okada, Eijiro
Toyama, Yoshiaki
Iwanami, Akio
Ishii, Ken
Nakamura, Masaya
Matsumoto, Morio
Ikegawa, Shiro
Article History
Received: 28 May 2015
Revised: 9 July 2015
Accepted: 18 July 2015
First Online: 17 September 2015
Competing interests
: The authors declare no conflict of interest.