title: Chronic pulmonary diseases--problems.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001982:Bronchial Diseases / Q000453:epidemiology; D002031:Bulgaria; D002648:Child; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008171:Lung Diseases / Q000453:epidemiology*; D008175:Lung Neoplasms / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology; D012959:Socioeconomic Factors; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology