Funding for this research was provided by:
Japan Society for the Promotion of Science (26870200, 15H02972, ORA-Plus research project, 17H06190, 20H04146)
Japan Center for Economic Research
Article History
Received: 30 July 2020
Accepted: 21 January 2021
First Online: 7 February 2021
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. This article does not contain any studies with animals performed by any of the authors.