Mukai, Kojiro
Konno, Hiroyasu
Akiba, Tatsuya
Uemura, Takefumi
Waguri, Satoshi
Kobayashi, Toshihide
Barber, Glen N.
Arai, Hiroyuki
Taguchi, Tomohiko
Article History
Received: 4 November 2015
Accepted: 13 May 2016
First Online: 21 June 2016
Competing interests
: The authors declare no competing financial interests.