Chronic bronchitis in non-smokers: role of infections.
D000375:Aging; D000818:Animals; D001991:Bronchitis / Q000209:etiology; D005541:Forced Expiratory Volume; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000209:etiology*; D012141:Respiratory Tract Infections / Q000150:complications* / Q000503:physiopathology; D012907:Smoking