Infection, the environment and chronic bronchitis.
D000397:Air Pollution; D000402:Airway Obstruction / Q000150:complications; D001419:Bacteria / Q000302:isolation & purification; D001424:Bacterial Infections / Q000150:complications*; D001991:Bronchitis / Q000209:etiology*; D002908:Chronic Disease; D004781:Environmental Exposure; D006801:Humans; D009175:Mycoplasma Infections / Q000150:complications; D011656:Pulmonary Emphysema / Q000150:complications; D012141:Respiratory Tract Infections / Q000175:diagnosis / Q000382:microbiology; D012907:Smoking; D013147:Spirometry; D013183:Sputum / Q000382:microbiology; D014777:Virus Diseases / Q000150:complications*