title: Interinstrument variability of three portable peak flow meters.
authors.forename: B
authors.initials: B
authors.lastname: Schmekel
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010366:Peak Expiratory Flow Rate; D012129:Respiratory Function Tests / Q000295:instrumentation*