Katagiri, Naohiro
Kuroda, Takao
Kishimoto, Hiroyuki
Hayashi, Yuki
Kumazawa, Takuya
Kimura, Keiji
Article History
Received: 18 August 2014
Accepted: 10 February 2015
First Online: 10 March 2015
Competing interests
: The authors declare no competing financial interests.