Horita, Nobuyuki
Yamamoto, Masaki
Sato, Takashi
Tsukahara, Toshinori
Nagakura, Hideyuki
Tashiro, Ken
Shibata, Yuji
Watanabe, Hiroki
Nagai, Kenjiro
Nakashima, Kentaro
Ushio, Ryota
Ikeda, Misako
Kobayashi, Nobuaki
Shinkai, Masaharu
Kudo, Makoto
Kaneko, Takeshi
Article History
Received: 9 September 2015
Accepted: 1 December 2015
First Online: 11 January 2016
Competing interests
: The authors declare no competing financial interests.