Fujii, Setsuko
Nishikawa-Torikai, Satomi
Futatsugi, Yoko
Toyooka, Yayoi
Yamane, Mariko
Ohtsuka, Satoshi
Niwa, Hitoshi
Article History
Received: 24 September 2014
Accepted: 9 February 2015
First Online: 16 March 2015
Competing interests
: The authors declare no competing financial interests.