Maeda, Akitoshi
Himeno, Yukiko
Ikebuchi, Masayuki
Noma, Akinori http://orcid.org/0000-0001-7314-8151
Amano, Akira
Article History
Received: 28 January 2017
Accepted: 5 April 2017
First Online: 17 April 2017
Compliance with ethical standards
: No experimental measurements were carried out in the present study.
: The authors declare that they have no conflict of interest.