Namikawa, Akio http://orcid.org/0000-0001-5659-6606
Shibuya, Yuko
Ouchi, Haruki
Takahashi, Hiroko
Furuto, Yoshitaka
Article History
Received: 17 July 2017
Accepted: 11 January 2018
First Online: 31 January 2018
Compliance with ethical standards
:
: The authors have declared that no conflict of interest exists.
: This article does not contain any studies on human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.