Yoshimatsu, Hiroki
Yonezawa, Atsushi
Yamanishi, Kaori
Yao, Yoshiaki
Sugano, Kumiko
Nakagawa, Shunsaku
Imai, Satoshi
Omura, Tomohiro
Nakagawa, Takayuki
Yano, Ikuko
Masuda, Satohiro
Inui, Ken-ichi
Matsubara, Kazuo
Article History
Received: 21 December 2015
Accepted: 18 May 2016
First Online: 8 June 2016
Competing interests
: The authors declare no competing financial interests.