Iwawaki, Takao
Akai, Ryoko
Oikawa, Daisuke
Toyoshima, Takae
Yoshino, Mayuko
Suzuki, Mitsumi
Takeda, Naoki
Ishikawa, Tomo-o
Kataoka, Yosky
Yamamura, Ken-ichi
Article History
Received: 19 August 2015
Accepted: 27 October 2015
First Online: 24 November 2015
Competing interests
: The authors declare no competing financial interests.