title: Chronic daily headache: is "cervicogenic headache" one subgroup?
abstract: "Chronic daily headache" should not include cervicogenic headache, which in its typical form is a unilateral headache that can be precipitated mechanically; in other words, probably an organic disorder. Chronic daily headache as such should not be included in the IHS classification.
authors.affiliation: Department of Neurology, Regionsykehuset i Trondheim, Trondheim University Hospitals, Norwegian University of Science and Technology.
authors.forename: O
authors.initials: O
authors.lastname: Sjaastad
authors.forename: T A
authors.initials: TA
authors.lastname: Frederiksen
mesh_terms: D002908:Chronic Disease; D002940:Circadian Rhythm / Q000502:physiology; D006261:Headache / Q000145:classification* / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D009333:Neck / Q000503:physiopathology*