Arita, Masashi
Takahashi, Akihito
Ohno, Yuuki
Nakane, Akitoshi
Tsurumaki-Fukuchi, Atsushi
Takahashi, Yasuo
Article History
Received: 18 August 2015
Accepted: 26 October 2015
First Online: 27 November 2015
Competing interests
: The authors declare no competing financial interests.