title: Brittle asthma: fiend or phantom?
authors.forename: M R
authors.initials: MR
authors.lastname: Hetzel
mesh_terms: D001249:Asthma / Q000145:classification / Q000188:drug therapy / Q000503:physiopathology*; D002940:Circadian Rhythm; D006801:Humans; D010366:Peak Expiratory Flow Rate / Q000502:physiology*