Relevance of tumor promotion to carcinogenesis in human populations.
D001943:Breast Neoplasms / Q000209:etiology; D003043:Cocarcinogenesis; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology; D009369:Neoplasms / Q000209:etiology*; D012907:Smoking; D013964:Thyroid Neoplasms / Q000209:etiology