title: Cluster headache: the relation to arousal, relaxation, and autonomic tone.
authors.forename: J R
authors.initials: JR
authors.lastname: Graham
mesh_terms: D001341:Autonomic Nervous System / Q000503:physiopathology*; D003027:Cluster Headache / Q000503:physiopathology*; D006801:Humans; D014653:Vascular Headaches / Q000503:physiopathology*