title: Implementing the International Classification of Headache Disorders, 2nd edition (ICHD-II).
authors.affiliation: Division of Neuroscience and Mental Health, Imperial College London, London, UK. t.steiner@imperial.ac.uk
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Steiner
authors.forename: Jes
authors.initials: J
authors.lastname: Olesen
mesh_terms: D006261:Headache; D020773:Headache Disorders; D006801:Humans