Kumai, Takumi
Ohkuri, Takayuki
Nagato, Toshihiro
Matsuda, Yoshinari
Oikawa, Kensuke
Aoki, Naoko
Kimura, Shoji
Celis, Esteban
Harabuchi, Yasuaki
Kobayashi, Hiroya
Article History
Received: 30 May 2015
Accepted: 13 October 2015
First Online: 5 November 2015
Competing interests
: The authors declare no competing financial interests.