Radon exposure and the risk of lung cancer.
D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology / Q000209:etiology*; D009381:Neoplasms, Radiation-Induced / Q000453:epidemiology / Q000209:etiology*; D011886:Radon / Q000009:adverse effects*; D018570:Risk Assessment; D012907:Smoking / Q000009:adverse effects