title: [Issue topic: Headache. Introduction].
mesh_terms: D006261:Headache / Q000145:classification*; D006801:Humans; D008881:Migraine Disorders; D009437:Neuralgia; D010146:Pain; D009626:Terminology as Topic; D013997:Time Factors
vernacular_title: Themenheft: Kopfschmerz. Vorwort