Yamaguchi, Hironori
Okubo, Tsuyoshi
Kittaka, Shunichiro
Sakakibara, Toshiro
Araki, Koji
Iwase, Kenji
Amaya, Naoki
Ono, Toshio
Hosokoshi, Yuko
Article History
Received: 19 June 2015
Accepted: 24 September 2015
First Online: 15 October 2015
Competing interests
: The authors declare no competing financial interests.