Received: 23 May 2020
Accepted: 31 July 2020
First Online: 22 August 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were conducted in accordance with the ethical standards of the institutional review board of the ethics committee and national research committee and with the 1964 Helsinki Declaration and its later amendments. The Tottori University Hospital Ethics Committee approved this study (No. 17A135).
: Not applicable.
: The authors declare that they have no competing interests.