Hayashi, Ken’ichiro
Murai, Toshiyuki
Oikawa, Hiroki
Masuda, Tomoyuki
Kimura, Kazuhiro
Muehlich, Susanne
Prywes, Ron
Morita, Tsuyoshi
Article History
Received: 29 December 2014
Accepted: 22 April 2015
First Online: 29 May 2015
Competing interests
: The authors declare no competing financial interests.