title: Measuring the frequency of adverse drug reactions.
authors.affiliation: Medicines Control Agency, London.
authors.forename: P C
authors.initials: PC
authors.lastname: Waller
mesh_terms: D016907:Adverse Drug Reaction Reporting Systems; D016022:Case-Control Studies; D015331:Cohort Studies; D064420:Drug-Related Side Effects and Adverse Reactions; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D006113:United Kingdom