title: [Head-HUNT--hunting for causal headache factors].
authors.affiliation: Avdeling for nevrologi og klinisk nevrofysiologi St. Olavs Hospital 7006 Trondheim. knut.hagen@stolav.no
authors.forename: Knut
authors.initials: K
authors.lastname: Hagen
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006261:Headache / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D006306:Health Surveys; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D009664:Norway / Q000453:epidemiology; D015995:Prevalence; D011446:Prospective Studies; D012307:Risk Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires