Sumida, Kentaro
Ohno, Yosuke
Ohtake, Junya
Kaneumi, Shun
Kishikawa, Takuto
Takahashi, Norihiko
Taketomi, Akinobu
Kitamura, Hidemitsu
Article History
Received: 4 February 2015
Accepted: 3 August 2015
First Online: 1 September 2015
Competing interests
: The authors declare no competing financial interests.