Funding for this research was provided by:
the Foundation for Health, Labour and Welfare Policy Research Grants (19FA2001, 21FA1013)
Received: 14 April 2022
Accepted: 13 October 2022
First Online: 24 October 2022
: The return of a completed questionnaire was considered to imply consent to participate in the study, including the baseline survey data and subsequent follow-up. Information regarding LTCI certification status was also confirmed after obtaining written consent. Informed consent was obtained from all subjects. The Ethics Committee of Tohoku University Graduate School of Medicine (Sendai, Japan) reviewed and approved the study protocol including the method to obtain informed consent (approval code: 2006–206). All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.