TY - JOUR T1 - Correction JF - Journal of Neurology, Neurosurgery & Psychiatry JO - J Neurol Neurosurg Psychiatry SP - 149 LP - 149 DO - 10.1136/jnnp.52.1.149 VL - 52 IS - 1 A2 - , Y1 - 1989/01/01 UR - http://jnnp.bmj.com/content/52/1/149.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -