Article History
Received: 5 December 2020
Accepted: 20 January 2021
First Online: 5 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 line with the ethical standards of the Committee of Medical Ethics, University of Miyazaki (ethics approval number, O-0383) and the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained by an opt-out method. Concretely, the authors noted details of this study on their website and asked participants to offer the authors not to use their information until the specified date. After this date, the authors could use information without patients’ consent.
: Not applicable.
: Not applicable.