Maeda, Ryo
Kawasaki, Yukihiko
Ohara, Shinichiro
Suyama, Kazuhide
Hosoya, Mitsuaki
Article History
Received: 27 September 2017
Accepted: 21 December 2017
First Online: 5 January 2018
Compliance with ethical standards
:
: All the authors have declared that no conflict of interest exists.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.
Free to read: This content has been made available to all.