Inoue, Dan
Usui, Ryosuke
Nitta, Kosaku
Koike, Minako
Article History
Received: 15 January 2017
Accepted: 7 August 2017
First Online: 11 August 2017
Compliance with ethical standards
:
: All the authors declared no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors.