Umemura, Takeji
Joshita, Satoru
Yamazaki, Tomoo
Komatsu, Michiharu
Katsuyama, Yoshihiko
Yoshizawa, Kaname
Tanaka, Eiji
Ota, Masao
Article History
Received: 8 April 2016
Accepted: 23 June 2016
First Online: 11 July 2016
Competing interests
: The authors declare no competing financial interests.