Yamamoto, Toshiyuki http://orcid.org/0000-0002-9484-3505
Shimojima, Keiko
Shibata, Takashi
Akiyama, Mari
Oka, Makio
Akiyama, Tomoyuki
Yoshinaga, Harumi
Kobayashi, Katsuhiro
Article History
Received: 10 September 2015
Revised: 8 October 2015
Accepted: 13 October 2015
First Online: 19 November 2015
Competing interests
: The authors declare no conflict of interest.