Article History
Received: 14 December 2019
Accepted: 31 March 2020
First Online: 21 April 2020
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 Committee of Medical Ethics, University of Miyazaki (Ethics approval number: O-0383) and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained by opt-out method. Concretely, the authors noticed 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 who asked us not to use.
: Not applicable.