Iketani, Masumi
Yokoyama, Takaakira
Kurihara, Yuji
Strittmatter, Stephen M.
Goshima, Yoshio
Kawahara, Nobutaka
Takei, Kohtaro
Article History
Received: 15 January 2016
Accepted: 24 November 2016
First Online: 21 December 2016
Competing interests
: The authors declare no competing financial interests.