Kato, Souichiro
Kanata, Yoshiki
Kitagawa, Wataru
Sone, Teruo
Asano, Kozo
Kamagata, Yoichi
Article History
Received: 12 December 2016
Accepted: 4 April 2017
First Online: 16 May 2017
Competing Interests
: The authors declare that they have no competing interests.