RT Journal Article SR Electronic T1 Retracted article to be reinstated JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 942 OP 942 DO 10.1136/jnnp.2004.48363.ret2 VO 81 IS 8 YR 2010 UL http://jnnp.bmj.com/content/81/8/942.1.abstract AB