title: Observer bias in acellular pertussis vaccine trials.
authors.forename: S
authors.initials: S
authors.lastname: Salmaso
authors.forename: A E
authors.initials: AE
authors.lastname: Tozzi
authors.forename: M L
authors.initials: ML
authors.lastname: Ciofi degli Atti
mesh_terms: D002648:Child; D004341:Drug Evaluation / Q000706:statistics & numerical data*; D006801:Humans; D015588:Observer Variation; D010567:Pertussis Vaccine; D012107:Research Design
chemical_list: D010567:Pertussis Vaccine