1. U.S. EPA (Environmental Protection Agency). Health Risk of Radon [Website]. Washington DC:U.S. EPA (updated 27 August 2018). https://www.epa.gov/radon/health-risk-radon [accessed 21 December 2018].
2. American Cancer Society. Radon and Cancer [Website]. Atlanta GA:American Cancer Society (updated 23 September 2015). https://www.cancer.org/cancer/cancer-causes/radiation-exposure/radon.html [accessed 21 December 2018].
3. Global Estimate of Lung Cancer Mortality Attributable to Residential Radon
4. Conference of Radiation Control Program Directors Inc. 2014. Reducing the Risk from Radon: Information and Interventions: A Guide for Health Care Providers. Frankfort KY:Conference of Radiation Control Program Directors Inc. http://www.radonleaders.org/resources/reducingtheriskfromradon [accessed 21 December 2018].
5. U.S. CDC (Centers for Disease Control and Prevention). Protect Yourself and Your Family from Radon [Website]. Atlanta GA:U.S. CDC (updated 8 January 2018). https://www.cdc.gov/features/protect-home-radon/index.html [accessed 21 December 2018].