Nagaoka, Akira
Takehara, Hiroaki
Hayashi-Takagi, Akiko
Noguchi, Jun
Ishii, Kazuhiko
Shirai, Fukutoshi
Yagishita, Sho
Akagi, Takanori
Ichiki, Takanori
Kasai, Haruo
Article History
Received: 2 November 2015
Accepted: 6 May 2016
First Online: 25 May 2016
Competing interests
: The authors declare no competing financial interests.