title: Cigarette smoking and cluster headaches.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003027:Cluster Headache / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012907:Smoking; D014653:Vascular Headaches / Q000209:etiology*