title: Headache classification.
authors.forename: L K
authors.initials: LK
authors.lastname: Mannix
authors.forename: G D
authors.initials: GD
authors.lastname: Solomon
authors.forename: R S
authors.initials: RS
authors.lastname: Kunkel
mesh_terms: D006261:Headache / Q000145:classification*; D006801:Humans; D007391:International Cooperation; D012955:Societies, Medical; D009626:Terminology as Topic