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Correspondence: jkruger@cdc.gov; Tel.: +1-011-404-639-2371.
Judy Kruger, Michelle Kegler, Brian King, Kristy Marynak designed the study.
Amal Jama analyzed the data and all authors helped interpret the data.
Judy Kruger drafted the manuscript and all authors contributed to the revision and writing of the paper.
The authors declare they have no competing interest to report.
The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.
Michelle Kegler funded by the National Cancer Institute under the State and Community Tobacco Control Initiative, Grant Number UO1-CA154282.
No funding, direct or indirect, for CDC authors.
© 2016 by the authors; licensee MDPI, Basel, Switzerland.