title: The "middling" tendency: a possible source of bias in the interpretation of chest films for pneumoconiosis.
mesh_terms: D003032:Coal Mining; D004781:Environmental Exposure; D006801:Humans; D011009:Pneumoconiosis / Q000145:classification / Q000000981:diagnostic imaging* / Q000209:etiology; D011859:Radiography; D014481:United States