Takeuchi, Jun
Okamoto, Masanori
Mega, Ryosuke
Kanno, Yuri
Ohnishi, Toshiyuki
Seo, Mitsunori
Todoroki, Yasushi
Article History
Received: 11 July 2016
Accepted: 24 October 2016
First Online: 14 November 2016
Competing interests
: The authors declare no competing financial interests.