Katayama, Taiki
Yoshioka, Hideyoshi
Muramoto, Yoshiyuki
Usami, Jun
Fujiwara, Kazuhiro
Yoshida, Satoshi
Kamagata, Yoichi
Sakata, Susumu
Article History
Received: 8 April 2014
Revised: 20 June 2014
Accepted: 27 June 2014
First Online: 8 August 2014
Competing interests
: The authors declare no conflict of interest.