Horita, Nobuyuki
Yamamoto, Masaki
Sato, Takashi
Tsukahara, Toshinori
Nagakura, Hideyuki
Tashiro, Ken
Shibata, Yuji
Watanabe, Hiroki
Nagai, Kenjiro
Inoue, Miyo
Nakashima, Kentaro
Ushio, Ryota
Shinkai, Masaharu
Kudo, Makoto
Kaneko, Takeshi
Article History
Received: 26 May 2015
Accepted: 31 July 2015
First Online: 21 October 2015
Competing interests
: The authors declare no competing financial interests.