Hiraoka, Takahiro http://orcid.org/0000-0002-4444-4127
Kotsuka, Junko
Kakita, Tetsuhiko
Okamoto, Fumiki
Oshika, Tetsuro
Article History
Received: 16 December 2016
Accepted: 10 July 2017
First Online: 11 August 2017
Competing Interests
: The authors declare that they have no competing interests.