title: Problem areas in the International Classification of Headache Disorders, 3rd edition (beta).
authors.affiliation: University of Copenhagen, Danish Headache Centre, Department of Neurology at Glostrup Hospital, Denmark jes.olesen@regionh.dk.
authors.forename: Jes
authors.initials: J
authors.lastname: Olesen
mesh_terms: D020773:Headache Disorders / Q000145:classification*; D006801:Humans; D038801:International Classification of Diseases
keywords: Headache; disease classification; migraine