Takahashi, Yusuke
Sakaguchi, Koji
Horio, Hirotoshi
Hiramatsu, Kyoko
Moriya, Shunsuke
Takahashi, Keiichi
Kawakita, Masao
Article History
Received: 23 July 2015
Revised: 5 September 2015
Accepted: 9 September 2015
First Online: 27 October 2015
Competing interests
: The authors declare no conflict of interest.