Funding for this research was provided by:
National Institute on Aging (PO1AG014449)
Received: 19 December 2017
Accepted: 2 July 2018
First Online: 11 September 2018
Ethics approval and consent to participate
: All subjects signed an informed consent and an Anatomic Gift Act donating their brains at time of death. The Human Investigation Committee of Rush University Medical Center approved this study.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.