Funding for this research was provided by:
Japan Society for the Promotion of Science (17K10049)
Article History
First Online: 13 July 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interests.
: The study was conducted according to the human research guidelines of the institutional review board of the University of Niigata and with the approval of the research ethics committee of the University of Niigata under the approval of the Research Ethics Committee (approval number # 2482) and in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: All participants provided informed consent.
: The authors affirm that human research participants provided informed consent for publication of their data.