title: Response of cluster headache attacks to oxygen inhalation.
mesh_terms: D002986:Clinical Trials as Topic; D003027:Cluster Headache / Q000628:therapy*; D004878:Ergotamine / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010102:Oxygen Inhalation Therapy; D011897:Random Allocation; D014653:Vascular Headaches / Q000628:therapy*
chemical_list: D004878:Ergotamine