title: Migraine: theory to therapy--25 years of progress.
authors.affiliation: Department of Medicine Dalhousie University Chief of Service Capital Health Halifax, Nova Scotia, Canada.
authors.forename: R Allan
authors.initials: RA
authors.lastname: Purdy
mesh_terms: D004358:Drug Therapy / Q000639:trends*; D006801:Humans; D008881:Migraine Disorders / Q000188:drug therapy* / Q000209:etiology; D009511:New England; D018710:Pain Clinics