RT Journal Article SR Electronic T1 Correction JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 1414 OP 1414 DO 10.1136/jnnp.2008.146548 VO 81 IS 12 YR 2010 UL http://jnnp.bmj.com/content/81/12/1414.6.abstract AB