Funding for this research was provided by:
National Institutes of Health (P20 GM103527, UL1 TR000117)
American Heart Association (14POST20310025)
Received: 24 April 2017
Accepted: 16 October 2017
First Online: 9 November 2017
Ethics approval and consent to participate
: The study was approved by Institutional Review Boards at both the University of Kentucky (13–0201-P6H) and Geisinger Health System (2015–0159). All subjects provided assent and their parents/legal guardians provided written and informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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