Funding for this research was provided by:
Government of Japan Ministry of Health, Labor, and Welfare (201105016A)
Article History
Received: 26 February 2018
Accepted: 6 October 2018
First Online: 11 October 2018
Compliance with Ethical Standards
:
: The authors declared 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.