Fujimura, Reiko
Kim, Seok-Won
Sato, Yoshinori
Oshima, Kenshiro
Hattori, Masahira
Kamijo, Takashi
Ohta, Hiroyuki
Article History
Received: 10 September 2015
Accepted: 16 December 2015
First Online: 21 January 2016
Competing interests
: The authors declare no competing financial interests.