Editorial: Cluster headache.
D002908:Chronic Disease; D003937:Diagnosis, Differential; D004878:Ergotamine / Q000627:therapeutic use; D006261:Headache; D006801:Humans; D008881:Migraine Disorders / Q000175:diagnosis; D014653:Vascular Headaches / Q000175:diagnosis / Q000188:drug therapy
D004878:Ergotamine