Honmou, Yoshihiro
Hirata, Shuzo
Komiyama, Hideaki
Hiyoshi, Junya
Kawauchi, Susumu
Iyoda, Tomokazu
Vacha, Martin
Article History
Received: 12 March 2014
Accepted: 11 July 2014
First Online: 14 August 2014
Competing interests
: The authors declare no competing financial interests.