Respiratory mucosa.
D002273:Carcinogens; D004848:Epithelium / Q000187:drug effects; D006801:Humans; D008297:Male; D011230:Precancerous Conditions / Q000209:etiology; D012142:Respiratory Tract Neoplasms / Q000209:etiology*; D012907:Smoking
D002273:Carcinogens