Funding for this research was provided by:
National Institute on Aging (R01AG21912, P50AG16573)
National Institute of Child Health and Human Development (R01HD064993, R01HD065160)
Received: 17 October 2017
Accepted: 21 November 2017
First Online: 1 December 2017
Ethics approval and consent to participate
: Consent for autopsy was obtained from individuals enrolled in the study and was approved by the University of California Human Subjects Institutional Review Board.
: The authors declare that they have no competing interests.
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