Horita, Nobuyuki
Otsuka, Tatsuya
Haranaga, Shusaku
Namkoong, Ho
Miki, Makoto
Miyashita, Naoyuki
Higa, Futoshi
Takahashi, Hiroshi
Yoshida, Masahiro
Kohno, Shigeru
Kaneko, Takeshi
Article History
Received: 26 May 2015
Accepted: 17 August 2015
First Online: 16 September 2015
Competing interests
: The authors declare no competing financial interests.