Funding for this research was provided by:
National Heart, Lung, and Blood Institute (R01 HL128289, P50 HL084948)
National Cancer Institute (P50 CA90440)
National Institute on Aging (P30 AG024827)
Received: 29 January 2020
Accepted: 20 May 2020
First Online: 2 July 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board at the University of Pittsburgh prior to study initiation. Informed consent to participate was obtained from each participant prior to study enrollment.
: Not applicable.
: The authors declare that they have no competing interests.