Funding for this research was provided by:
National Institutes of Health (UL1TR001857, P50HL084948, R21HL129917, K23HL126912, K24HL123342)
National Heart, Lung, and Blood Institute (R01HL128289)
National Institutes of Health (R01HL090648)
Pennsylvania Department of Health (CURE SAP 4100062224)
Received: 4 January 2019
Accepted: 13 June 2019
First Online: 24 June 2019
Ethics approval and consent to participate
: Ethical approval was granted by the University of Pittsburgh Institutional Review Board, #MOD0612016–25 / IRB0612016. All subjects provided informed consent to take part in this study.
: Explicit consent for publication was obtained from study subjects for the use of representative images in this manuscript.
: The authors declare that they have no competing interests.