Int. J. Environ. Res. Public Health 2018, 15, 2149
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Acknowledgments: The authors would like to extend our sincere appreciation to the staff working for the radon
programs in the states of Florida, Iowa, Illinois, Kansas, Ohio, Texas, Virginia, and West Virginia for their guidance,
advice and clarification on radon testing in school policies in their states.
Conflicts of Interest: The authors declare no conflict of interest.
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