Hirakawa, Yosuke
Yoshihara, Toshitada
Kamiya, Mako
Mimura, Imari
Fujikura, Daichi
Masuda, Tsuyoshi
Kikuchi, Ryohei
Takahashi, Ippei
Urano, Yasuteru
Tobita, Seiji
Nangaku, Masaomi
Article History
Received: 3 September 2015
Accepted: 5 November 2015
First Online: 8 December 2015
Competing interests
: The authors declare no competing financial interests.