Funding for this research was provided by:
National Institute on Aging (P30AG017266)
National Institutes of Health (R01AG060109, R01AG062765)
Article History
Received: 21 August 2019
Accepted: 11 May 2020
First Online: 11 June 2020
Ethics approval and consent to participate
: Not applicable. Data used in this study were derived from death records. Research involving deceased individuals only is not human subjects research according to 45 CFR 46.102(f) and does not require IRB oversight.
: Not applicable.
: The authors declare that they have no competing interests.