Nakano, Koichiro
Chigira, Takeru
Miyafusa, Takamitsu
Nagatoishi, Satoru
Caaveiro, Jose M. M.
Tsumoto, Kouhei
Article History
Received: 14 June 2015
Accepted: 23 September 2015
First Online: 16 October 2015
Competing interests
: The authors declare no competing financial interests.