Funding for this research was provided by:
Foundation for the National Institutes of Health (OH010791)
Text and Data Mining valid from 2019-01-23
Received: 18 August 2018
Accepted: 13 January 2019
First Online: 23 January 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the University of North Carolina. The involvement of the Centers for Disease Control and Prevention (CDC) laboratory did not constitute engagement in human subjects research.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.