Koizumi, Taichi
Terada, Tohru
Nakajima, Ken-ichiro
Kojima, Masaki
Koshiba, Seizo
Matsumura, Yoshitaka
Kaneda, Kohei
Asakura, Tomiko
Shimizu-Ibuka, Akiko
Abe, Keiko
Misaka, Takumi
Article History
Received: 31 March 2015
Accepted: 10 July 2015
First Online: 11 August 2015
Competing interests
: The authors declare no competing financial interests.