Funding for this research was provided by:
National Institute on Aging (U01AG032947, K01AG054751)
Received: 1 July 2019
Accepted: 31 October 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: NHATS was approved by the Johns Hopkins Bloomberg School of Public Health IRB and these analyses were deemed exempt from review by the Johns Hopkins Medicine IRB. Participants provided written informed consent.
: The authors declare that they have no competing interests.