title: Cluster headache: unilaterality as demonstrated by ictal forehead sweating.
mesh_terms: D003027:Cluster Headache / Q000503:physiopathology*; D005546:Forehead; D007839:Functional Laterality; D006801:Humans; D013546:Sweating; D014653:Vascular Headaches / Q000503:physiopathology*