Nakajima, Ayako
Nakanishi, Takayuki
Kitagawa, Yuichi
Seki, Tomohiro
Ito, Hajime
Fushimi, Koji
Hasegawa, Yasuchika
Article History
Received: 4 November 2015
Accepted: 29 March 2016
First Online: 14 April 2016
Competing interests
: The authors declare no competing financial interests.