Tsujioka, Hiroshi http://orcid.org/0000-0001-7484-4191
Kunieda, Takekazu http://orcid.org/0000-0002-6256-1335
Katou, Yuki
Shirahige, Katsuhiko
Fukazawa, Taro http://orcid.org/0000-0003-1380-4924
Kubo, Takeo
Article History
Received: 1 November 2016
Accepted: 10 July 2017
First Online: 8 September 2017
Competing interests
: The authors declare no competing financial interests.