title: Subarachnoid haemorrhage: lumbar puncture for every negative scan?
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Coats
mesh_terms: D006261:Headache / Q000209:etiology; D006801:Humans; D013129:Spinal Puncture / Q000706:statistics & numerical data*; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*