Funding for this research was provided by:
National Heart, Lung, and Blood Institute (HL120951)
Received: 24 May 2017
Accepted: 22 March 2018
First Online: 12 April 2018
Ethics approval and consent to participate
: The Institutional Review Board at Harvard T.H. Chan School of Public Health, Ponce Health Sciences University in Puerto Rico, University of Massachusetts, and Northeastern University approved the study. All participants provided written informed consent.
: Not applicable
: The authors declare that they have no competing interests.
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