Oka, Daichi
Hirose, Yasushi
Kamisaka, Hideyuki
Fukumura, Tomoteru
Sasa, Kimikazu
Ishii, Satoshi
Matsuzaki, Hiroyuki
Sato, Yukio
Ikuhara, Yuichi
Hasegawa, Tetsuya
Article History
Received: 16 October 2013
Accepted: 28 April 2014
First Online: 16 May 2014
Competing interests
: The authors declare no competing financial interests.