Epidemiological studies on smoking in relation to lung cancer.
D016021:Epidemiologic Studies; D006331:Heart Diseases / Q000209:etiology*; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology*; D012907:Smoking / Q000009:adverse effects*
HEART DISEASES/etiology and pathogenesis; LUNG NEOPLASMS/etiology and pathogenesis; SMOKING/injurious effects