title: When to scan, when to operate.
authors.forename: S
authors.initials: S
authors.lastname: Workman
mesh_terms: D003937:Diagnosis, Differential; D015276:Health Care Rationing; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000191:economics* / Q000601:surgery*; D012680:Sensitivity and Specificity; D013129:Spinal Puncture; D014057:Tomography, X-Ray Computed