Received: 29 August 2020
Accepted: 19 November 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. This study was approved by Certified Review Board, Tottori University Hospital, and the requirement for informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.