title: The natural history of episodic cluster headache.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003027:Cluster Headache / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors; D014653:Vascular Headaches / Q000503:physiopathology*