Yamada, Akifumi
Fujinaga, Shuichiro
Sakuraya, Koji
Satoshi, Asanuma
Hirano, Daishi
Article History
Received: 16 December 2017
Accepted: 27 February 2018
First Online: 8 March 2018
Compliance with ethical standards
:
: The authors have declared that no conflict of interest exists.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee at which the studies were conducted (approved number 2017-99-018) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.