title: Migraine and other causes of headache.
authors.affiliation: Department of Medicine, University of Toronto, and St. Michael's Hospital, Ontario, Canada.
authors.forename: J
authors.initials: J
authors.lastname: Spence
mesh_terms: D004635:Emergency Medicine; D006261:Headache / Q000145:classification / Q000188:drug therapy / Q000209:etiology*; D006801:Humans; D008881:Migraine Disorders / Q000150:complications*; D010147:Pain Measurement / Q000706:statistics & numerical data; D010919:Placebos; D012107:Research Design; D016896:Treatment Outcome
chemical_list: D010919:Placebos