Yagi, Shunsuke
Yamada, Ikuya
Tsukasaki, Hirofumi
Seno, Akihiro
Murakami, Makoto
Fujii, Hiroshi
Chen, Hungru
Umezawa, Naoto
Abe, Hideki
Nishiyama, Norimasa
Mori, Shigeo
Article History
Received: 20 May 2015
Accepted: 31 July 2015
First Online: 10 September 2015
Competing interests
: The authors declare no competing financial interests.