Article History
Received: 11 October 2020
Accepted: 1 November 2021
First Online: 23 November 2021
Competing interests
: The authors declare no competing interests.
: This study was conducted according to the principles of the Declaration of Helsinki (1991). Approval was obtained from the Institutional Review Board of Tohoku University (Approved No. 2020-1-575).
: The purpose of this study was explained in a document that was displayed on a web page. Informed consent was obtained from participants through the submission of their response to the questionnaire.