Tanimizu, Naoki
Ichinohe, Norihisa
Yamamoto, Masahiro
Akiyama, Haruhiko
Nishikawa, Yuji
Mitaka, Toshihiro
Article History
Received: 31 August 2016
Accepted: 30 November 2016
First Online: 4 January 2017
Competing interests
: The authors declare no competing financial interests.