Kikushima, Wataru
Sakurada, Yoichi
Yoneyama, Seigo
Sugiyama, Atsushi
Tanabe, Naohiko
Kume, Atsuki
Mabuchi, Fumihiko
Iijima, Hiroyuki
Article History
Received: 25 August 2016
Accepted: 2 February 2017
First Online: 7 March 2017
Competing interests
: The authors declare no competing financial interests.