Funding for this research was provided by:
National Heart, Lung, and Blood Institute (R01HL137929)
Received: 14 August 2019
Accepted: 16 October 2019
First Online: 5 December 2019
Ethics approval and consent to participate
: All study protocols have been approved by the Institutional Review Board at the University of North Carolina at Chapel Hill (19-0406) and written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.