Kohara, Shinji
Akola, Jaakko
Patrikeev, Leonid
Ropo, Matti
Ohara, Koji
Itou, Masayoshi
Fujiwara, Akihiko
Yahiro, Jumpei
Okada, Junpei T.
Ishikawa, Takehiko
Mizuno, Akitoshi
Masuno, Atsunobu
Watanabe, Yasuhiro
Usuki, Takeshi
Article History
Received: 12 February 2014
Accepted: 18 November 2014
First Online: 18 December 2014
Competing interests
: The authors declare no competing financial interests.