Funding for this research was provided by:
National Institute on Aging (U01AG009740, R01AG055398, U01AG032947)
Received: 3 June 2019
Accepted: 28 January 2020
First Online: 2 March 2020
Ethics approval and consent to participate
: HRS was approved by the University of Michigan Health Sciences/Behavioral Sciences Institutional Review Board. HRS participants provided verbal informed consent prior to being interviewed. NHATS was approved by the Johns Hopkins Bloomberg School of Public Health Institutional Review Board. NHATS participants completed written informed consent prior to being interviewed.
: Not applicable.
: The authors declare that they have no competing interests.