Funding for this research was provided by:
The Research Funding for Longevity Sciences from the National Center for Geriatrics and Gerontology (29-45)
The grant from Japan Agency for Medical Research and Development (JP19dk0207028, JP18kk0205009, JP18kk0205012)
The grant for Research on Dementia from the Japanese Ministry of Health, Labor and Welfare (-)
Received: 23 January 2019
Accepted: 6 May 2019
First Online: 20 June 2019
Ethics approval and consent to participate
: All subjects provided written informed consent. Ethics approval was obtained from the ethics review board at NCGG and of each institute.
: Not applicable.
: The authors declare that they have no competing interests.
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