title: Natural history of cluster headache. Part I. Outcome of drop-out patients.
mesh_terms: D000328:Adult; D000368:Aged; D000428:Alcohol Drinking; D003027:Cluster Headache / Q000401:mortality / Q000503:physiopathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010352:Patient Dropouts; D012075:Remission, Spontaneous; D012907:Smoking; D014653:Vascular Headaches / Q000503:physiopathology*