Sakakibara, Yogo
Hashimoto, Shu
Nakaoka, Yoshiharu
Kouznetsova, Anna
Höög, Christer
Kitajima, Tomoya S.
Article History
Received: 23 April 2015
Accepted: 18 May 2015
First Online: 1 July 2015
Competing interests
: The authors declare no competing financial interests.