Funding for this research was provided by:
National Heart, Lung, and Blood Institute (R01HL108390)
Centers for Disease Control and Prevention (R01HL108390)
National Institute of Diabetes and Digestive and Kidney Diseases (DK056350)
Received: 9 March 2017
Accepted: 17 August 2017
First Online: 29 August 2017
Ethics approval and consent to participate
: All protocols for this study have been approved by the Institutional Review Boards at the University of North Carolina Chapel Hill (11–0102) and Duke University (Pro00039422). All participants were provided an approved consent form and only those with signed consent participated in this study.
: The authors declare that they have no competing interests.
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