title: Challenges in the diagnosis of acute headache.
authors: University of Toronto, Ontario, Canada.
authors: J
authors: J
authors: Edmeads
mesh_terms: D000208:Acute Disease; D000465:Algorithms; D003937:Diagnosis, Differential; D006261:Headache / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D006801:Humans; D008881:Migraine Disorders / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed