Sakai, Kentaro
Asakura, Kumiko
Saito, Kazuyuki
Fukunaga, Tatsushige
Article History
Accepted: 18 January 2019
First Online: 27 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The article does not contain any studies with human participants or animals.
: The article does not include participants that require their informed consent.