Yamada, Kohji
Miyamoto, Yoichi
Tsujii, Akira
Moriyama, Tetsuji
Ikuno, Yudai
Shiromizu, Takashi
Serada, Satoshi
Fujimoto, Minoru
Tomonaga, Takeshi
Naka, Tetsuji
Yoneda, Yoshihiro
Oka, Masahiro
Article History
Received: 22 September 2015
Accepted: 22 January 2016
First Online: 18 February 2016
Competing interests
: The authors declare no competing financial interests.