Horita, Nobuyuki
Yamamoto, Masaki
Sato, Takashi
Tsukahara, Toshinori
Nagakura, Hideyuki
Tashiro, Ken
Shibata, Yuji
Watanabe, Hiroki
Nagai, Kenjiro
Nakashima, Kentaro
Ushio, Ryota
Ikeda, Misako
Sakamaki, Kentaro
Yoshiyama, Takashi
Kaneko, Takeshi
Article History
Received: 6 October 2015
Accepted: 12 November 2015
First Online: 9 December 2015
Competing interests
: The authors declare no competing financial interests.