Shimada, Shino
Hirano, Yoshiko
Ito, Susumu
Oguni, Hirokazu
Nagata, Satoru
Shimojima, Keiko
Yamamoto, Toshiyuki http://orcid.org/0000-0002-9484-3505
Article History
Received: 24 September 2014
Revised: 20 October 2014
Accepted: 20 October 2014
First Online: 4 December 2014
Competing interests
: The authors declare no conflict of interest.