Sakai, Kenichi
Okada, Yugo
Uemura, Takafumi
Tsurumi, Junto
Häusermann, Roger
Matsui, Hiroyuki
Fukami, Tatsuya
Ishii, Hiroyuki
Kobayashi, Nobuhiko
Hirose, Kenji
Takeya, Jun
Article History
Received: 27 May 2015
Revised: 18 October 2015
Accepted: 24 November 2015
First Online: 25 March 2016
Competing interests
: The authors declare no conflicts of interest.