Received: 15 September 2020
Accepted: 2 February 2021
First Online: 15 February 2021
Ethics approval and consent to participate
: This protocol has been approved by both the institutional review board of Kobe University Hospital (Approval number: 240030) and the review board of Hyogo Brain and Heart Center (Approval number: 27–09), in accordance with the Declaration of Helsinki, and the written informed consent for participating this study was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.