Received: 2 October 2020
Accepted: 25 January 2021
First Online: 8 February 2021
Ethics approval and consent to participate
: This study was performed in accordance with the Declaration of Helsinki and approved by the Ethics Committee of Osaka University Graduate School of Medicine. We obtained informed consent from all subjects in the form of opt-out on the Web (sitehttp://ExternalRef removed).
: Not applicable.
: The authors declare that they have no competing interests.