Received: 10 December 2020
Accepted: 17 May 2021
First Online: 25 May 2021
: This study was approved by the Institutional Review Board of Gifu University. The principles of the World Medical Association and the Declaration of Helsinki were applied in this study. Written informed consent was obtained from all participants in this study. All participants were informed that their comments would be kept anonymous and that their quotations would be included in the paper.
: Not applicable.
: The authors declare that there are no competing interests.