Received: 24 September 2019
Accepted: 5 March 2020
First Online: 20 March 2020
Ethics approval and consent to participate
: Human subject protections approval for obtaining the radon testing data was approved by the University of Kentucky Medical Institutional Review Board (#44648). A waiver of consent was approved given this was a secondary data analysis with no identifiers.
: Not applicable.
: The authors declare that they have no competing interests.