title: [Therapy of chronic headache].
mesh_terms: D002908:Chronic Disease; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D008881:Migraine Disorders / Q000188:drug therapy; D014653:Vascular Headaches / Q000188:drug therapy
vernacular_title: Die Therapie chronischer Kopfschmerzen.