Viruses and chronic bronchitis.
D000328:Adult; D001991:Bronchitis / Q000150:complications*; D002648:Child; D002908:Chronic Disease; D006801:Humans; D012141:Respiratory Tract Infections / Q000150:complications*; D012229:Rhinovirus / Q000302:isolation & purification; D012606:Scotland; D014777:Virus Diseases / Q000150:complications*