title: Special issue on severe asthma.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Wardlaw
authors.forename: Robyn E
authors.initials: RE
authors.lastname: O'Hehir
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Corrigan
authors.forename: Qutabya A
authors.initials: QA
authors.lastname: Hamid
mesh_terms: D001249:Asthma / Q000175:diagnosis / Q000628:therapy; D018450:Disease Progression; D006801:Humans; D012720:Severity of Illness Index