Funding for this research was provided by:
National Institute on Aging (P30 AG019610)
Received: 21 April 2018
Accepted: 10 September 2018
First Online: 2 October 2018
Ethics approval and consent to participate
: Written informed consent was obtained from all subjects and informants. Research using the NACC database was approved by the Institutional Review Board at the University of Washington.
: Provided by the NACC after prior review.
: JC declares no competing interests. JW and MS declare no competing financial interests.
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