title: Cigarette smoking and small irregular opacities.
authors.forename: A L
authors.initials: AL
authors.lastname: Frank
mesh_terms: D006801:Humans; D015588:Observer Variation; D011009:Pneumoconiosis / Q000000981:diagnostic imaging* / Q000209:etiology; D011859:Radiography; D012907:Smoking / Q000009:adverse effects*