title: Towards evidence based emergency medicine: best BETs from the Manchester Royal Infirmary. Does a normal CT scan rule out a subarachnoid haemorrhage?
authors: Department of Emergency Medicine, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK.
authors: S
authors: S
authors: Carley
authors: P
authors: P
authors: Wallmann
mesh_terms: D000328:Adult; D004630:Emergencies; D019317:Evidence-Based Medicine; D006801:Humans; D008297:Male; D012680:Sensitivity and Specificity; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed