Funding for this research was provided by:
Japan Society for the Promotion of Science
Article History
Received: 25 July 2017
Accepted: 23 October 2017
First Online: 6 November 2017
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all participants included in the study.