Haramoto, Yoshikazu
Takahashi, Shuji
Oshima, Tomomi
Onuma, Yasuko
Ito, Yuzuru
Asashima, Makoto
Article History
Received: 7 August 2014
Accepted: 29 May 2015
First Online: 26 June 2015
Competing interests
: The authors declare no competing financial interests.