title: Unilateral hypnic headache: a case study.
authors.affiliation: Department of Neurology, Pennsylvania Hospital, Philadelphia, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Gould
authors.forename: S D
authors.initials: SD
authors.lastname: Silberstein
mesh_terms: D000368:Aged; D002940:Circadian Rhythm / Q000502:physiology; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006261:Headache / Q000503:physiopathology*; D006801:Humans; D012890:Sleep / Q000502:physiology*