Yamamoto, Toshiyuki http://orcid.org/0000-0002-9484-3505
Shimojima, Keiko
Shimada, Shino
Yokochi, Kenji
Yoshitomi, Shinsaku
Yanagihara, Keiko
Imai, Katsumi
Okamoto, Nobuhiko
Article History
Received: 18 May 2014
Revised: 23 May 2014
Accepted: 26 May 2014
First Online: 24 July 2014
Competing interests
: The authors declare no conflict of interest.