Funding for this research was provided by:
Grants-in-Aid for Scientific Research (16K09175)
Article History
Received: 27 November 2020
Accepted: 7 February 2021
First Online: 24 March 2021
Ethics approval and consent to participate
: The ethics committee of Oita University approved this study. We did not collect individual information. The study protocol adhered to the guideline stipulated in the Helsinki Declaration and Clinical Trials Act made by the Ministry of Health, Labour, and Welfare in Japan. The research purpose was made known to participants before the survey. They were informed that their answering the survey would be regarded as informed consent.
: We have obtained consent to publish from the participant.
: The authors declare no competing interests.