title: Pulmonary zonal involvement in coal workers' pneumoconiosis.
mesh_terms: D003032:Coal Mining; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D011009:Pneumoconiosis / Q000145:classification* / Q000175:diagnosis / Q000000981:diagnostic imaging; D013902:Radiography, Thoracic; D014481:United States