title: Chronic daily headache.
authors.forename: William
authors.initials: W
authors.lastname: Hamilton
authors.forename: Carl
authors.initials: C
authors.lastname: Roobottom
mesh_terms: D002908:Chronic Disease; D003362:Cost-Benefit Analysis; D058006:General Practice; D020773:Headache Disorders / Q000000981:diagnostic imaging / Q000191:economics / Q000209:etiology*; D006801:Humans; D012017:Referral and Consultation; D014057:Tomography, X-Ray Computed / Q000009:adverse effects / Q000191:economics