RT Journal Article SR Electronic T1 CORRECTION JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 96 OP 96 DO 10.1136/jnnp.2008.147983corr1 VO 80 IS 1 YR 2009 UL http://jnnp.bmj.com/content/80/1/96.abstract AB