title: Chronic bronchitis in non-smokers: general environmental factors.
mesh_terms: D000393:Air Pollutants / Q000506:poisoning*; D000818:Animals; D004812:Epidemiologic Methods; D005060:Europe; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000139:chemically induced* / Q000453:epidemiology; D009585:Nitrogen Dioxide / Q000506:poisoning; D010126:Ozone / Q000506:poisoning; D012907:Smoking; D013455:Sulfur / Q000506:poisoning
chemical_list: D000393:Air Pollutants; D010126:Ozone; D013455:Sulfur; D009585:Nitrogen Dioxide