title: Peak flow meters: a problem of scale.
authors.forename: M R
authors.initials: MR
authors.lastname: Miller
authors.forename: P H
authors.initials: PH
authors.lastname: Ouanjer
mesh_terms: D006801:Humans; D010366:Peak Expiratory Flow Rate; D012129:Respiratory Function Tests / Q000295:instrumentation* / Q000592:standards; D012680:Sensitivity and Specificity