title: The contribution of respiratory viruses to severe exacerbations of asthma in adults.
authors.forename: A H
authors.initials: AH
authors.lastname: Ahmed
authors.forename: K G
authors.initials: KG
authors.lastname: Nicholson
authors.forename: V S
authors.initials: VS
authors.lastname: Hammersley
mesh_terms: D000328:Adult; D001249:Asthma / Q000821:virology*; D018450:Disease Progression; D006801:Humans; D012141:Respiratory Tract Infections / Q000150:complications* / Q000821:virology; D012720:Severity of Illness Index