Funding for this research was provided by:
Japan Society for the Promotion of Science (23300205, 26702033, 20J01647, 20K19442)
Japanese Ministry of Health, Labor, and Welfare (H24-tyoujyuippan-004)
National Center for Geriatrics and Gerontology (22-16, 26-33, 27-22)
Obu City Local Government
Received: 27 April 2021
Accepted: 16 October 2021
First Online: 26 October 2021
: The study protocol was developed in accordance with the Declaration of Helsinki and was approved by the ethics committee of the National Center for Geriatrics and Gerontology. Prior to participation in the study, written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.