Funding for this research was provided by:
Japan Society for the Promotion of Science (26380362)
Article History
First Online: 21 February 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest in the report or the study it describes.
: All procedures performed in studies involving human participants were in accordance with ethical rules by Japan Society for the Promotion of Science.
: Informed consent was obtained from all respondents to the survey in the study.