RT Journal Article SR Electronic T1 ACUTE HEADACHE IN THE EMERGENCY DEPARTMENT JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP ii33 OP ii37 DO 10.1136/jnnp.72.suppl_2.ii33 VO 72 IS suppl 2 A1 Richard Davenport YR 2002 UL http://jnnp.bmj.com/content/72/suppl_2/ii33.abstract AB