[The exogenous factors in the etiology of tumors].
D000397:Air Pollution; D006801:Humans; D007306:Insecticides / Q000633:toxicity*; D009369:Neoplasms / Q000209:etiology*; D011832:Radiation Injuries / Q000150:complications*; D012907:Smoking
D007306:Insecticides
AIR POLLUTION; INSECTICIDES/toxicology; NEOPLASMS/etiology; RADIATION INJURY/complications; SMOKING