Funding for this research was provided by:
Grant-in-Aid for Scientific Researc (17K09184)
Japan Society for the Promotion of Science (JSPS) Overseas Research Fellowships program grant (201960143)
Article History
Received: 27 May 2020
Accepted: 26 July 2020
First Online: 5 August 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the International University of Health and Welfare (approval number: 19-Im-010).
: Not applicable
: The authors have no conflicts of interest directly relevant to the content of this study.