Sakuma, Naoko
Moteki, Hideaki
Takahashi, Masahiro
Nishio, Shin-ya
Arai, Yasuhiro
Yamashita, Yukiko
Oridate, Nobuhiko
Usami, Shin-ichi
Article History
Received: 23 August 2015
Revised: 29 September 2015
Accepted: 18 October 2015
First Online: 14 January 2016
Competing interests
: The authors declare no conflict of interest.