Funding for this research was provided by:
National Cancer Institute (R01 CA184473-01A1)
Received: 18 May 2017
Accepted: 5 September 2017
First Online: 12 September 2017
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the Office of Human Research Ethics at the University of North Carolina at Chapel Hill. Written informed consent for participation was obtained from participants.
: Not applicable.
: The authors declare that they have no competing interests.
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