Funding for this research was provided by:
National Institute on Aging (U01AG032947)
Received: 28 February 2020
Accepted: 10 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: The NHATS study was approved by the Johns Hopkins University Institutional Review Board. Participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.