title: Laughing headache: a novel type of triggered headache with response to divalproex sodium.
authors.affiliation: Department of Medicine, Section of Neurology, Dartmouth Medical School, Hitchcock Medical Center, 1 Medical Center Drive, Lebanon, NH 03756-0001, USA.
authors.forename: Morris
authors.initials: M
authors.lastname: Levin
authors.forename: Thomas N
authors.initials: TN
authors.lastname: Ward
mesh_terms: D018682:GABA Agents / Q000627:therapeutic use*; D006261:Headache / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D007845:Laughter; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D014635:Valproic Acid / Q000627:therapeutic use*
chemical_list: D018682:GABA Agents; D014635:Valproic Acid