Clinical studies in chronic bronchitis: a need for better definition and classification of severity.
Wilson
R
R
Department of Thoracic Medicine, Royal Brompton National Heart and Lung Institute, London, UK.
Tillotson
G
G
Ball
P
P
D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D001991:Bronchitis / Q000145:classification / Q000188:drug therapy / Q000209:etiology; D006801:Humans
D000900:Anti-Bacterial Agents