Yamamoto, Toshiyuki http://orcid.org/0000-0002-9484-3505
Shimojima, Keiko
Kimura, Nobusuke
Mogami, Yukiko
Usui, Daisuke
Takayama, Rumiko
Ikeda, Hiroko
Imai, Katsumi
Article History
Received: 9 July 2015
Revised: 2 September 2015
Accepted: 23 September 2015
First Online: 5 November 2015
Competing interests
: The authors declare no conflict of interest.