Tobacco smoking habits and cancer of the mouth and respiratory system.
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D002273:Carcinogens; D006184:Habits; D006801:Humans; D009055:Mouth; D009062:Mouth Neoplasms; D009369:Neoplasms; D012137:Respiratory System; D012907:Smoking; D012122:Ventilators, Mechanical; D062789:Tobacco Products
D002273:Carcinogens