title: Longitudinal study of the radiology of coal workers' pneumoconiosis. II. Emphysema and hili.
mesh_terms: D000328:Adult; D003032:Coal Mining; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008875:Middle Aged; D009784:Occupational Diseases / Q000209:etiology; D011009:Pneumoconiosis / Q000000981:diagnostic imaging*; D011656:Pulmonary Emphysema / Q000000981:diagnostic imaging* / Q000209:etiology; D011859:Radiography