title: Oral challenge tests for urticaria--an ethical dilemma.
authors.forename: R J
authors.initials: RJ
authors.lastname: Smith
authors.forename: J L
authors.initials: JL
authors.lastname: Burton
mesh_terms: D001241:Aspirin / Q000009:adverse effects; D002908:Chronic Disease; D004992:Ethics, Medical; D005503:Food Additives / Q000009:adverse effects; D006801:Humans; D014581:Urticaria / Q000209:etiology*
chemical_list: D005503:Food Additives; D001241:Aspirin