Contributors
J. O’Connor carried out the research and
drafted the essay. G. Matthews provided
guidance in conceptualizing the study
and in drafting the essay.
Acknowledgments
We thank Thomas Ricketts, Jon Oberlander,
and Pam Silberman of the University
of North Carolina at Chapel Hill
and Ali Khan of the Centers for Disease
Control and Prevention for their support.
Human Participant Protection
This study was approved by the institutional
review board of the University of
North Carolina at Chapel Hill.