Yasaka, Koichiro http://orcid.org/0000-0002-0324-6562
Akai, Hiroyuki
Kunimatsu, Akira
Kiryu, Shigeru
Abe, Osamu
Article History
Received: 28 December 2017
Accepted: 26 February 2018
First Online: 1 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.